Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Microchip Technology SG1524J-883B

Name: SG1524J-883B
Brand: Microchip Technology
SKU: SG1524J-883B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SG1524J-883B

Manufacturer:: Microchip Technology

Category:: DC DC Switching Controllers

Package:: 16-CDIP (0.300", 7.62mm)

Datasheet:: SG1524J-883B.pdf

Description:: IC REG CTRLR MULT TOP 16JDIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,988

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SG1524J-883B from Microchip Technology is a military-grade regulating pulse width modulator IC designed for high-reliability DC-DC switching power supplies. It integrates voltage reference, error amplifier, oscillator, PWM comparator, pulse steering flip-flop, dual 50 mA output transistors, and current-limiting/shutdown circuitry in a 16-pin ceramic DIP (J-package). Operating from –55 °C to +125 °C with 8–40 V input, it supports single-ended and push-pull topologies in transformer-coupled converters, polarity inverters, and voltage doublers.

For engineers reviewing the SG1524J-883B datasheet, SG1524J-883B pinout, SG1524J-883B application, or SG1524J-883B equivalent, key selection considerations include its MIL-STD-883B qualification, 5 V ±2% reference, 100 Hz–300 kHz oscillator range, dual alternating outputs with 50 mA drive, and current-sense threshold of 200 mV - all validated for extended-temperature aerospace and defense power control systems.

Technical Context

The SG1524J-883B implements a fixed-frequency PWM architecture with an internal oscillator whose frequency is set by external RT and CT components (100 Hz–300 kHz), delivering linear sawtooth timing waveforms for precise duty-cycle control. Its pulse steering flip-flop ensures complementary, non-overlapping outputs - critical for preventing shoot-through in push-pull transformer drivers.

It features a dedicated current-limit amplifier with ±0.3 V common-mode input range referenced to ground, enabling low-side sensing in primary-side current limiting; combined with shutdown logic triggered at 0.2–1.8 V, this provides robust fault protection in mission-critical power stages without external supervision circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Temp Range	–55 °C to +125 °C ambient - qualified per MIL-STD-883B for space, avionics, and ground-based military systems.
Input Voltage Range	8 V to 40 V - supports wide-input unregulated bus rails typical in vehicle and aircraft power distribution.
Reference Voltage	5.00 V ±2% (4.80–5.20 V) - stable internal bandgap reference with 0.4% line/load regulation enables precision feedback loop design.
Oscillator Frequency	100 Hz to 300 kHz - externally programmable via RT/CT; usable up to 400 kHz under specific conditions for high-density converter designs.
Output Drive	Dual 50 mA NPN transistors - capable of directly driving gate transformers or discrete MOSFET bases without buffer stages in medium-power SMPS.
Current Sense Threshold	200 mV ±5 mV - sets overcurrent trip point with minimal external components; requires ≤50 Ω source impedance for <5% error.
Supply Current	<10 mA total - enables low-quiescent operation in standby or battery-backed subsystems.

Pinout & Package

SG1524J-883B is housed in a hermetic 16-pin ceramic dual-in-line package (J-package), rated for 150 °C junction temperature and compliant with MIL-M38510/12601BEA. Thermal resistance θ_JA = 80 °C/W enables reliable operation in convection-cooled military chassis without forced airflow.

Pin/Terminal	Circuit Role	Design Meaning
1 (COMP)	Error amplifier output	Drives PWM comparator; connects to feedback network for closed-loop voltage regulation.
2 (V_REF)	5 V reference output	Stable 5 V supply for external circuitry (e.g., op-amps, sensors); load-limited to 20 mA.
3 (CLK)	External sync input	Accepts TTL-compatible pulses (≥2.4 V high, ≤0.3 V low) to synchronize multiple controllers or external clocks.
4 (CL+)	Current limit sense positive	High-impedance input for ground-referenced current sensing; bias current flows out (~150 µA).
5 (CL–)	Current limit sense negative	Ground reference for CL amplifier; bias current variable (0–150 µA); must be tied to system ground if unused.
6 (RT)	Oscillator timing resistor	Sets charging current (3.6 V / R_T) for linear ramp generation; R_T = 1.8–100 kΩ.
7 (CT)	Oscillator timing capacitor	Generates sawtooth waveform; C_T = 1 nF–1.0 µF; minimum 1000 pF required for stable flip-flop operation.
8 (GND)	Power ground	Main return path for internal circuits and output transistors; separate from CL sense ground in precision layouts.
9 (OUT A)	Output transistor A collector	Open-collector NPN output; sinks up to 50 mA; used for single-ended or push-pull phase A.
10 (OUT B)	Output transistor B collector	Open-collector NPN output; sinks up to 50 mA; alternates with OUT A under flip-flop control.
11 (V_IN)	Positive supply input	Primary power rail (8–40 V); powers all internal blocks including output transistors and reference.
12 (SHDN)	Shutdown control	Active-low enable; <0.8 V disables outputs and reduces supply current to ~7 mA standby.
13 (INV)	Inverting input of error amp	Connects to feedback divider; common-mode range 1.8–3.4 V for stable regulation across input/output variations.
14 (NON-INV)	Non-inverting input of error amp	Typically tied to V_REF (Pin 2) for standard voltage-mode control; enables alternative compensation schemes.
15 (V_C)	Error amplifier output bypass	Connects external compensation capacitor (e.g., 1–10 nF) to stabilize loop response and prevent oscillation.
16 (V_CC)	Internal bias supply	Internally generated ~5 V rail for analog blocks; not user-accessible; decoupling recommended near Pin 16.

Key Features

Feature	Design Value
Hermetic J-package with MIL-STD-883B screening	Ensures long-term reliability in high-vibration, radiation-prone, and extreme-temperature environments (–55 °C to +125 °C).
Dual alternating NPN output transistors	Enables direct push-pull drive of transformer primaries without external driver ICs or discrete transistors.
Ground-referenced current limit amplifier	Supports simple, low-cost low-side sensing with 200 mV threshold - avoids high-side sense complexity and cost in primary-side regulation.
External oscillator synchronization capability	Allows precise phase alignment of multiple SG1524J-883B units in parallel or interleaved power modules to reduce EMI and input ripple.
Single-ended or push-pull configuration flexibility	Wire-OR outputs for 0–90% duty cycle (buck) or use separately for 0–45% per output (push-pull), doubling effective switching frequency at transformer.

Applications

Aerospace DC-DC Converters	Military Vehicle Power Systems
Use Scenario: Regulated 28 V DC output from 18–32 V aircraft bus in flight control actuators. IC Role / Device Role / Timing Role: Primary PWM controller generating synchronized gate drive for push-pull MOSFETs in isolated forward converter. Use Value: Dual alternating outputs and 200 mV current limit enable precise primary-side overcurrent protection without secondary sensing, reducing component count and failure points.	Use Scenario: 12 V/24 V polarity-inverting supply for legacy analog instrumentation in armored vehicles. IC Role / Device Role / Timing Role: Core regulator IC in transformer-coupled inverter topology, operating across –40 °C to +85 °C under engine bay thermal cycling. Use Value: Extended –55 °C to +125 °C rating and MIL-STD-883B qualification ensure uninterrupted operation during cold-soak and sustained high-temp missions.
Spacecraft Payload Power Supplies	Radiation-Hardened Test Equipment
Use Scenario: Point-of-load 5 V/3.3 V regulators for FPGA and ADC subsystems on LEO satellite payloads. IC Role / Device Role / Timing Role: Regulating PWM modulator controlling synchronous buck stage; reference output powers local analog monitoring circuitry. Use Value: 5 V reference with 0.4% regulation and <50 mV temperature drift eliminates need for external precision reference, saving board space and BOM cost.	Use Scenario: Programmable high-stability bench power supply with remote sensing and overcurrent cutoff. IC Role / Device Role / Timing Role: Master timing and control IC in lab-grade switching supply; oscillator synchronized to external 10 MHz reference for ultra-low jitter output. Use Value: Excellent external sync capability (200 ns min pulse width, ±0.3 V logic thresholds) enables sub-microsecond phase lock to metrology-grade clocks.

Aerospace DC-DC Converters

Military Vehicle Power Systems

Use Scenario: Regulated 28 V DC output from 18–32 V aircraft bus in flight control actuators.

IC Role / Device Role / Timing Role: Primary PWM controller generating synchronized gate drive for push-pull MOSFETs in isolated forward converter.

Use Value: Dual alternating outputs and 200 mV current limit enable precise primary-side overcurrent protection without secondary sensing, reducing component count and failure points.

Use Scenario: 12 V/24 V polarity-inverting supply for legacy analog instrumentation in armored vehicles.

IC Role / Device Role / Timing Role: Core regulator IC in transformer-coupled inverter topology, operating across –40 °C to +85 °C under engine bay thermal cycling.

Use Value: Extended –55 °C to +125 °C rating and MIL-STD-883B qualification ensure uninterrupted operation during cold-soak and sustained high-temp missions.

Spacecraft Payload Power Supplies

Radiation-Hardened Test Equipment

Use Scenario: Point-of-load 5 V/3.3 V regulators for FPGA and ADC subsystems on LEO satellite payloads.

IC Role / Device Role / Timing Role: Regulating PWM modulator controlling synchronous buck stage; reference output powers local analog monitoring circuitry.

Use Value: 5 V reference with 0.4% regulation and <50 mV temperature drift eliminates need for external precision reference, saving board space and BOM cost.

Use Scenario: Programmable high-stability bench power supply with remote sensing and overcurrent cutoff.

IC Role / Device Role / Timing Role: Master timing and control IC in lab-grade switching supply; oscillator synchronized to external 10 MHz reference for ultra-low jitter output.

Use Value: Excellent external sync capability (200 ns min pulse width, ±0.3 V logic thresholds) enables sub-microsecond phase lock to metrology-grade clocks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PWM controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UC1524J	Pin-compatible predecessor with identical pinout and function; oscillator max frequency limited to 200 kHz (vs. 300 kHz for SG1524J-883B); no MIL-STD-883B screening option.	Used in legacy military designs where 200 kHz switching suffices and full 883B compliance is not mandated.	Select UC1524J only when backward compatibility with older schematics is required and extended frequency headroom is unnecessary.
LM5039MHX/NOPB	Modern current-mode controller in 16-pin HTSSOP; supports 50–750 kHz, integrated high-side gate driver, no built-in reference or current-sense amp; requires external components for similar functionality.	Targeted at higher-efficiency, higher-frequency telecom and industrial SMPS; lacks hermetic packaging and extended temperature range.	Choose LM5039MHX/NOPB for new designs prioritizing efficiency and density over ruggedization; not suitable as drop-in replacement for SG1524J-883B.

Compared with UC1524J, SG1524J-883B offers higher oscillator frequency headroom and formal MIL-STD-883B qualification; compared with LM5039MHX/NOPB, it delivers fully integrated analog control with hermetic reliability but at lower switching frequencies and without current-mode advantages.

Availability

SG1524J-883B is available at Aetrix Electronics and suitable for aerospace power conversion, military vehicle electronics, spacecraft payload regulation, and radiation-tolerant test equipment requiring stable component supply across extended temperature and lifecycle demands.

Supply support for SG1524J-883B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a global semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with a strong heritage in high-reliability and military-grade components.

The SG1524J-883B belongs to Microchip's legacy high-reliability PWM controller product line, engineered specifically for demanding analog power control in defense, aerospace, and industrial systems where long-term stability and environmental resilience are mandatory.

FAQ

What is the maximum allowable oscillator frequency for SG1524J-883B under production conditions?

The SG1524J-883B is specified for oscillator frequencies from 100 Hz to 300 kHz across its full operating temperature range. While Table 4-1 shows a maximum of 400 kHz under specific test conditions (RT = 2 kΩ, CT = 1 nF), this is not guaranteed over temperature or life - the 300 kHz upper limit is the production-tested, fully characterized maximum for reliable long-term operation in SG1524J-883B applications.

Does SG1524J-883B support current-mode control, or is it strictly voltage-mode?

The SG1524J-883B implements voltage-mode PWM control using an internal error amplifier and oscillator-derived sawtooth. It does not feature a dedicated current-sense comparator for peak-current-mode operation. However, its current-limit amplifier can override the error amplifier output to reduce duty cycle - this is cycle-by-cycle foldback protection, not true current-mode control with slope compensation.

Can SG1524J-883B be used in a single-ended flyback configuration?

Yes, SG1524J-883B supports single-ended topologies: its two outputs can be wire-ORed to produce a 0–90% duty cycle signal ideal for driving the gate of a single MOSFET in flyback or buck converters. The internal flip-flop is bypassed in this mode, and oscillator frequency equals output switching frequency - confirmed in Section 5.1 of the datasheet.

What is the purpose of Pin 16 (V_CC) on SG1524J-883B, and should it be externally decoupled?

Pin 16 (V_CC) is the internally generated bias supply node for analog circuitry - not an input or output. Though not user-accessible, datasheet Figure 5-3 and layout guidance recommend placing a 0.1 µF ceramic capacitor between Pin 16 and ground to suppress noise coupling into the error amplifier and reference sections, improving regulation accuracy and transient response in SG1524J-883B designs.

Is SG1524J-883B RoHS-compliant, and what finish is applied to its leads?

SG1524J-883B uses Pb37/Sn63 hot solder lead finish per Note 3 in Table 6-1, making it non-RoHS-compliant. This eutectic solder finish is standard for hermetic J-package devices qualified to MIL-STD-883B. RoHS versions are not offered for SG1524J-883B; alternate packages (e.g., SG3524N) provide RoHS compliance but lack military temperature and screening specs.

SG1524J-883B Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 16-CDIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Output Type:: Transistor Driver

Function:: Step-Down, Step-Up/Step-Down

Output Configuration:: Positive

Topology:: Buck, Flyback, Push-Pull

Number of Outputs:: 2

Output Phases:: 1

Voltage - Supply (Vcc/Vdd):: 8V ~ 40V

Frequency - Switching:: 100kHz ~ 300kHz

Duty Cycle (Max):: 49%

Synchronous Rectifier:: Yes

Clock Sync:: No

Serial Interfaces:: -

Control Features:: Enable

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: Military

Qualification:: MIL-STD-883

Mounting Type:: Through Hole

Supplier Device Package:: 16-CERDIP

SG1524J-883B FAQ

1.How can I place an order for SG1524J-883B through Aetrix?

Please submit a Request for Quotation (RFQ) for SG1524J-883B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SG1524J-883B reliable?

The price and inventory of SG1524J-883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SG1524J-883B is usually 5 days.

3.What payment methods are accepted for SG1524J-883B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SG1524J-883B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SG1524J-883B?

SG1524J-883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SG1524J-883B order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SG1524J-883B?

For technical support, including SG1524J-883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SG1524J-883B requirements.

6.How does Aetrix verify that SG1524J-883B is sourced from the original manufacturer or authorized distributors?

All SG1524J-883B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SG1524J-883B meets industry standards.

7.What is the process for return or replacement of SG1524J-883B?

All SG1524J-883B units undergo pre-shipment inspection (PSI). If there is an issue with SG1524J-883B, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SG1524J-883B part is unused and in its original packaging.

Return procedure for SG1524J-883B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…