My Inquiry
My Account
Analog Devices Inc. LTC1436ACGN-PLL#TRPBF
- Part No.:
- LTC1436ACGN-PLL#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1436ACGN-PLL#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,156
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1436ACGN-PLL#TRPBF from Analog Devices (formerly Linear Technology) is a phase-lockable, fixed-frequency synchronous step-down switching regulator controller driving external N-channel MOSFETs. It operates from 3.5V to 36V input, delivers up to 5A output with programmable 1.19V–9V regulation, features ≤300ns minimum on-time, and integrates a 0.5A auxiliary linear regulator for low-noise CPU I/O or audio supplies - used in notebook power rails and portable instrumentation.
For engineers reviewing the LTC1436ACGN-PLL#TRPBF datasheet, LTC1436ACGN-PLL#TRPBF pinout, LTC1436ACGN-PLL#TRPBF application, or LTC1436ACGN-PLL#TRPBF equivalent, key selection criteria include PLL-synchronizable oscillator (112–240 kHz), dual N-MOSFET synchronous drive capability, remote voltage sense support, and 24-lead narrow SSOP package compatibility with high-density portable PCB layouts.
Technical Context
The LTC1436ACGN-PLL#TRPBF implements a current-mode, constant-frequency control architecture with Adaptive Power™ output stage that dynamically selects between TGL/BG (high-current) and TGS (low-current) gate drivers to maintain fixed-frequency operation down to ~1% load. Its PLL block accepts external clock via PLLIN and modulates oscillator frequency ±30% through PLL LPF (0–2.4V control range), enabling EMI reduction and multi-rail synchronization.
It integrates dual regulation paths: main buck loop with VOSENSE feedback and VPROG-selectable output (1.19V/3.3V/5V), plus auxiliary linear regulator controlled by AUXON/AUXFB/AUXDR pins supporting 12V PNP-based outputs or comparator mode. Internal 5V INTVCC regulator powers drivers, with EXTVCC switchover at 4.7V for efficiency optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports wide-range industrial and battery-powered inputs including 12V/24V rails and Li-ion stacks. |
| Oscillator Frequency | 112–240 kHz (PLL-locked) - enables precise EMI filtering and synchronized multi-converter operation. |
| Min On-Time | ≤300 ns - allows high-frequency, low-duty-cycle conversion (e.g., 5V→1.2V @ 1MHz-equivalent duty) without pulse skipping. |
| Output Current Support | Up to 5A - determined by external MOSFETs and RSENSE; internal current sense threshold is 130–180 mV. |
| Auxiliary Regulator | 0.5A linear output - provides low-noise, low-dropout supply for sensitive analog circuits or CPU I/O using external PNP pass device. |
| Shutdown IQ | <25 µA - enables micropower hold mode in battery-critical applications like PDAs and cellular handsets. |
| Package | 24-lead narrow SSOP (GN) - 150-mil body, 0.635mm pitch; compatible with standard surface-mount reflow and automated optical inspection. |
Pinout & Package
Package: 24-lead narrow plastic SSOP (GN), 150-mil width, 0.635 mm lead pitch, θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOSENSE | Main output voltage feedback input | Accepts remote-sense signal or resistive divider output; sets regulation point via internal 1.19V reference. |
| VPROG | Output voltage selection control | DC voltage level selects 1.19V (open), 3.3V (0V), or 5V (INTVCC); enables pin-strapped configuration without external resistors. |
| TGL / BG / TGS | Synchronous gate drive outputs | TGL drives high-side N-MOSFET; BG drives low-side N-MOSFET; TGS drives auxiliary small N-MOSFET for Adaptive Power mode. |
| PLLIN / PLL LPF | Phase-locked loop interface | PLLIN accepts external sync clock; PLL LPF is phase detector output and oscillator control voltage (0–2.4V). |
| RUN/SS | Enable + soft-start control | Pulling below 0.8V disables regulator; capacitor to ground sets ramp time (~0.5 s/µF) for controlled startup. |
| AUXON / AUXFB / AUXDR | Auxiliary regulator interface | AUXON enables 0.5A linear regulator; AUXFB is feedback node; AUXDR sinks base current of external PNP transistor. |
Key Features
| Feature | Design Value |
|---|---|
| PLL-synchronizable oscillator | Enables deterministic EMI profile and multi-phase coordination across multiple LTC1436ACGN-PLL#TRPBF controllers in same system. |
| Adaptive Power™ gate drive | Automatically switches between TGL/BG and TGS drivers to sustain fixed-frequency operation down to ~1% load - avoids audible noise and improves light-load efficiency vs Burst Mode. |
| Integrated 0.5A auxiliary LDO | Reduces BOM count by eliminating separate low-noise linear regulator for CPU I/O or audio biasing; supports 12V output via internal resistive divider when AUXDR > 9.5V. |
| Remote output voltage sensing | Compensates for IR drop in PCB traces or connectors - maintains ±0.8% load regulation accuracy at point-of-load under full 5A current. |
| Programmable soft start | Prevents inrush current and output overshoot during power-up; timing set by external capacitor on RUN/SS pin with 3µA internal current source. |
Applications
| Portable Computing Power | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Power management in ultraportable notebooks and 2-in-1 tablets requiring dual-rail (core + I/O) regulation from single-cell or multi-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary buck controller for main system rail (e.g., 3.3V/5V), with auxiliary LDO supplying low-noise 1.8V/2.5V for CPU I/O interfaces. Use Value: Adaptive Power mode eliminates light-load Burst Mode noise; PLL sync allows coordinated switching with display backlight driver to suppress beat frequencies. | Use Scenario: Precision data acquisition systems in handheld multimeters and portable oscilloscopes needing clean analog supplies and stable digital rails. IC Role / Device Role / Timing Role: Main DC/DC converter for 5V logic rail and auxiliary linear regulator for 12V op-amp bias or sensor excitation. Use Value: Remote sensing ensures ±0.5% output accuracy at ADC reference; low dropout (99% duty cycle) extends battery runtime during brownout conditions. |
| Wireless Modem Power | Industrial DC Distribution |
Use Scenario: Power conversion in LTE/Wi-Fi modules where RF sensitivity demands ultra-low ripple and tightly controlled switching frequency. IC Role / Device Role / Timing Role: Synchronized buck controller locked to baseband clock via PLLIN to avoid heterodyne interference in RF front-end. Use Value: PLL lock reduces spectral spreading; <300ns min on-time enables efficient 5V→1.2V conversion for RF SoC cores without external post-regulation. | Use Scenario: Distributed power architecture in factory automation controllers requiring robust 24V-to-5V conversion with fault monitoring. IC Role / Device Role / Timing Role: Primary step-down controller with integrated low-battery detection (LBI/LBO) and power-on reset (POR) for system-level supervision. Use Value: Built-in POR timer (65536 cycles ≈ 300ms) ensures reliable microcontroller boot sequencing; foldback current limiting protects against short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1436ACGN#TRPBF | No PLL circuitry; fixed-frequency only (112–138 kHz); lacks PLLIN/PLL LPF pins. | Not suitable for EMI-sensitive or multi-rail synchronized designs; lower component count where sync not required. | Select when system does not require external clock synchronization and cost minimization is prioritized. |
| LT8610EMSE#TRPBF | Monolithic 3.5A buck (integrated MOSFETs); higher max fSW (2.2MHz); no auxiliary LDO or PLL. | Better for space-constrained designs; unsuitable for high-current (>5A) or dual-rail (buck + LDO) applications. | Choose for compact, high-frequency solutions where external MOSFETs and auxiliary regulation are unnecessary. |
Compared with LTC1436ACGN#TRPBF, the LTC1436ACGN-PLL#TRPBF adds PLL synchronization capability critical for EMI control, while LT8610EMSE#TRPBF trades external power stage flexibility and auxiliary regulation for integration and higher switching frequency - making each optimal for distinct system-level trade-offs.
Availability
LTC1436ACGN-PLL#TRPBF is available at Aetrix Electronics and suitable for notebook computing power, portable instrumentation, and wireless modem applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC1436ACGN-PLL#TRPBF 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
Analog Devices acquired Linear Technology in 2017 and maintains its high-performance power management portfolio with rigorous automotive and industrial qualification standards.
The LTC1436A family was designed specifically for high-efficiency, low-noise synchronous buck control in portable and battery-operated systems - emphasizing adaptive light-load operation, wide VIN range, and integrated auxiliary regulation.
FAQ
What is the operating temperature range for the LTC1436ACGN-PLL#TRPBF?
The LTC1436ACGN-PLL#TRPBF is specified for commercial temperature range: 0°C to 70°C. This rating applies to the GN-package variant and is validated per the Absolute Maximum Ratings table in the official datasheet. Derating guidelines and thermal resistance (θJA = 110°C/W) must be applied for sustained high-power operation within this range. The LTC1436ACGN-PLL#TRPBF does not support extended or industrial temperature grades.
How does the PLL function work in the LTC1436ACGN-PLL#TRPBF?
The LTC1436ACGN-PLL#TRPBF uses an internal phase detector comparing external clock on PLLIN to its oscillator. The resulting error current charges/discharges the PLL LPF node, which directly controls oscillator frequency over 0–2.4V (±30% of nominal). When locked, top-MOSFET turn-on aligns to the rising edge of PLLIN - enabling deterministic EMI and multi-converter synchronization without external timing components.
Can the LTC1436ACGN-PLL#TRPBF operate without an external PNP transistor for the auxiliary regulator?
No - the auxiliary regulator in the LTC1436ACGN-PLL#TRPBF requires an external PNP pass transistor (e.g., 2N2907A) connected to AUXDR. The IC provides only the error amplifier, reference, and drive capability; it cannot deliver 0.5A output without the external PNP. Leaving AUXDR unconnected disables auxiliary regulation, and no internal pass device exists.
What is the minimum recommended RSENSE value for the LTC1436ACGN-PLL#TRPBF?
The datasheet specifies RSENSE ≥ 0.005Ω for stable operation. For a 5A design with 150mV current sense threshold, RSENSE = 100mV / 5A = 0.02Ω is typical. Lower values increase noise sensitivity and reduce current limit accuracy; values below 0.005Ω risk instability due to trace inductance and comparator offset effects. Always verify layout with Kelvin sensing for SENSE+ and SENSE–.
Does the LTC1436ACGN-PLL#TRPBF support forced continuous conduction mode (FCCM)?
Yes - the LTC1436ACGN-PLL#TRPBF supports FCCM via the SFB pin. Tying SFB to ground forces continuous operation regardless of load, disabling Adaptive Power mode and Burst Mode. This is used in noise-sensitive applications where variable-frequency operation must be avoided, though it reduces light-load efficiency compared to Adaptive Power operation.
LTC1436ACGN-PLL#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3.5V ~ 30V
- Frequency - Switching:
- Up to 400kHz
- Duty Cycle (Max):
- 99%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Power on Reset, Soft Start
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
LTC1436ACGN-PLL#TRPBF FAQ
1.How can I place an order for LTC1436ACGN-PLL#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1436ACGN-PLL#TRPBF 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 LTC1436ACGN-PLL#TRPBF reliable?
The price and inventory of LTC1436ACGN-PLL#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1436ACGN-PLL#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1436ACGN-PLL#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1436ACGN-PLL#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1436ACGN-PLL#TRPBF?
LTC1436ACGN-PLL#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1436ACGN-PLL#TRPBF 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 LTC1436ACGN-PLL#TRPBF?
For technical support, including LTC1436ACGN-PLL#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1436ACGN-PLL#TRPBF requirements.
6.How does Aetrix verify that LTC1436ACGN-PLL#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1436ACGN-PLL#TRPBF 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 LTC1436ACGN-PLL#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1436ACGN-PLL#TRPBF?
All LTC1436ACGN-PLL#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1436ACGN-PLL#TRPBF, 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 LTC1436ACGN-PLL#TRPBF part is unused and in its original packaging.
Return procedure for LTC1436ACGN-PLL#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1436ACGN-PLL#TRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
