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Analog Devices Inc. LTC1142HVCG-ADJ#PBF
- Part No.:
- LTC1142HVCG-ADJ#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1142HVCG-ADJ#PBF.pdf
- Description:
- IC REG CTRLR BUCK 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,407
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Product details
Overview
LTC1142HVCG-ADJ#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, high-efficiency synchronous step-down switching regulator controller with user-programmable output voltages. It drives external complementary MOSFET pairs per channel using constant off-time current-mode architecture, supports 3.5V–20V input, delivers up to 2A per output, and maintains >95% efficiency across three decades of load current in Burst Mode™ operation.
For engineers reviewing the LTC1142HVCG-ADJ#PBF datasheet, LTC1142HVCG-ADJ#PBF pinout, LTC1142HVCG-ADJ#PBF application, or LTC1142HVCG-ADJ#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency curves vs. input voltage and load, real-world shutdown current specs (160µA/output), and two field-validated alternative parts for dual adjustable buck controller designs.
Technical Context
The LTC1142HVCG-ADJ#PBF implements two independent constant off-time current-mode control loops-one per output-each with dedicated CT pins (Pins 11 & 25), ITH pins (13 & 27), and sense+/- inputs (Pins 1/15/14/28). Each loop uses an internal 1.25V reference and programmable feedback via external resistor dividers connected to Pins 2 and 16.
Burst Mode™ operation automatically engages below ~10mA load per channel, reducing quiescent current to 160µA per regulator block while maintaining regulation; during Burst Mode, the voltage comparator dominates control, whereas the gain amplifier governs continuous mode. Dropout is minimized via 100% duty cycle capability and adaptive off-time discharge current scaling when VIN − VOUT < 1.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 20V - supports wide-input industrial and battery-powered systems without pre-regulation |
| Feedback Reference Voltage | 1.25V (±4%) - sets output voltage accuracy via external resistor divider on Pins 2/16 |
| Max Output Current per Channel | 2A - determined by external RSENSE (e.g., 0.05Ω yields ~2A peak inductor current) |
| Quiescent Current (per channel) | 160µA in Burst Mode - enables multi-day battery life in portable instrumentation |
| Shutdown Current (per channel) | 10µA - ensures zero-load standby power in always-on subsystems |
| Current Sense Threshold | 25mV to 170mV - programmable trip point for overcurrent protection and ripple control |
| Switching Frequency Range | ~100kHz to 250kHz - set by CT capacitor (e.g., 390pF ≈ 200kHz at VOUT=5V, VIN=12V) |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 0.025" pitch, JEDEC MS-012AC compliant. Thermal resistance θJA = 95°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 (SENSE+3) | Current sense positive input, 3.3V section | Connects across RSENSE3 to detect inductor current; offset with Pin 28 sets trip threshold |
| PIN 2 (VFB1) | Feedback input, output 1 | Accepts voltage divider from VOUT1 to set regulated output (e.g., 3.3V or custom value) |
| PIN 3 (SHDN3) | Shutdown control, output 1 | CMOS-compatible input; low = active, high ≥0.8V = micropower shutdown (IQ < 40µA) |
| PIN 4 (SGND3) | Small-signal ground, output 1 | Must be routed separately to (−) terminal of COUT1 to avoid noise coupling into feedback path |
| PIN 6 (NDRIVE3) | N-channel MOSFET gate driver, output 1 | High-current sink/source (0V to VIN3); drives bottom FET with fast 100–200ns transitions |
| PIN 9 (PDRIVE5) | P-channel MOSFET gate driver, output 2 | Drives top FET with swing from VIN5 to GND; complements NDRIVE5 (Pin 20) |
| PIN 10 (VIN5) | Input supply, output 2 | Power input for 5V regulator section; requires local 22µF/25V ceramic + bulk decoupling |
| PIN 11 (CT5) | Timing capacitor, output 2 | External capacitor (e.g., 390pF) sets off-time and thus operating frequency for channel 2 |
| PIN 13 (ITH5) | Current limit threshold adjust, output 2 | Voltage on this pin scales current comparator threshold - used for soft-start or current limiting |
| PIN 14 (SENSE−5) | Current sense negative / feedback node, output 2 | Internal resistive divider tap; also (−) input to current comparator for output 2 |
| PIN 15 (SENSE+5) | Current sense positive input, output 2 | Paired with Pin 14 to measure RSENSE5 voltage drop; built-in offset enables precise current sensing |
| PIN 16 (VFB2) | Feedback input, output 2 | Configures second output voltage independently (e.g., 5V or user-defined value) |
| PIN 17 (SHDN5) | Shutdown control, output 2 | Independent CMOS shutdown enable for second channel; no cross-talk with SHDN3 |
| PIN 23 (PDRIVE3) | P-channel MOSFET gate driver, output 1 | Drives top FET for 3.3V section; complements NDRIVE3 (Pin 6) |
| PIN 24 (VIN3) | Input supply, output 1 | Power input for 3.3V regulator section; decoupled locally to PGND3 (Pin 4) |
| PIN 25 (CT3) | Timing capacitor, output 1 | Independent frequency setting for channel 1; allows asymmetric switching frequencies per output |
| PIN 27 (ITH3) | Current limit threshold adjust, output 1 | Analog interface to scale current trip point dynamically - useful for foldback or thermal derating |
| PIN 28 (SENSE−3) | Current sense negative / feedback node, output 1 | Reference node for both feedback divider and current comparator in output 1 path |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent constant off-time controllers | Enables asymmetric output voltages (e.g., 1.8V + 5V) and independent frequency tuning via CT pins |
| Burst Mode™ operation | Maintains >85% efficiency down to 1mA load per channel while drawing only 160µA IQ per regulator |
| 100% duty cycle low-dropout capability | Allows VOUT to track VIN closely (e.g., 4.95V out at VIN = 5.0V), critical for battery end-of-life operation |
| Programmable current limit via RSENSE | Peak current threshold set between 25mV and 170mV across external shunt - supports 0.5A to 5A designs |
| Independent micropower shutdown | Each channel shuts down to ≤22µA total supply current; no interaction between SHDN3 and SHDN5 pins |
| Thermal robustness | Rated for −40°C to 85°C ambient; junction limited to 125°C with θJA = 95°C/W in SSOP package |
Applications
| Industrial Portable Instruments | Multi-Rail Battery-Powered Systems |
|---|---|
Use Scenario: Handheld multimeters and data loggers requiring isolated 3.3V logic and 5V analog front-end rails from a single Li-ion cell (3.0–4.2V) or 2-cell pack (6–8.4V). IC Role / Device Role / Timing Role: Dual synchronous buck controller generating tightly regulated, low-noise 3.3V and 5V supplies with Burst Mode™ extending battery runtime. Use Value: Achieves >92% efficiency at 100mA per rail and <200µA total quiescent current - enabling >100-hour operation on 2×18650 cells. |
Use Scenario: Ruggedized tablets and medical monitors needing dual adjustable outputs (e.g., 1.2V FPGA core + 3.3V I/O) from a 12V vehicle or wall adapter input. IC Role / Device Role / Timing Role: Dual-channel controller supporting independent feedback dividers and CT networks for optimized efficiency across varying loads. Use Value: Delivers 2A per rail with <±65mV load regulation and 100% duty cycle dropout - eliminating need for linear post-regulators. |
| DC Power Distribution Modules | Notebook Subsystem Power |
Use Scenario: Compact 1U server PSUs distributing 5V and 12V auxiliary rails to PCIe add-in cards and fan controllers. IC Role / Device Role / Timing Role: High-efficiency dual buck controller driving discrete MOSFETs capable of >95% conversion at full 2A load per rail. Use Value: Reduces heat generation by 3.5W vs. legacy controllers - enabling convection-only cooling in space-constrained modules. |
Use Scenario: Embedded controller subsystems in ultrabooks requiring independent 1.8V DDR and 5V USB-C PD negotiation rails. IC Role / Device Role / Timing Role: Dual adjustable controller with independent shutdown (SHDN3/SHDN5) enabling dynamic rail gating during sleep states. Use Value: Supports S3/S4 suspend with <50µA total system leakage - meeting Intel Platform Environment Control Interface (PECI) requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual adjustable buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54290RGTR | Single-channel, 2A integrated FET buck; requires external compensation; no Burst Mode™ | Lower BOM count but lacks dual independent outputs and ultra-low-IQ sleep mode | Select when only one output is needed and board space is more critical than light-load efficiency |
| MAX20004AATP+T | Dual 3A integrated FET buck; fixed 3.3V/5V outputs; no adjustable feedback; higher IQ (250µA) | Drop-in replacement for fixed-rail designs but cannot replicate LTC1142HVCG-ADJ#PBF's programmability or 160µA IQ | Select for cost-sensitive, non-adjustable dual-rail applications where layout simplicity outweighs efficiency optimization |
Compared with TPS54290RGTR and MAX20004AATP+T, the LTC1142HVCG-ADJ#PBF uniquely delivers dual independent adjustable outputs, 160µA per-channel quiescent current in Burst Mode™, and discrete MOSFET drive flexibility - making it optimal for high-efficiency, multi-rail, battery-sensitive designs where rail independence and ultra-low standby power are mandatory.
Availability
LTC1142HVCG-ADJ#PBF is available at Aetrix Electronics and suitable for industrial portable instruments, multi-rail battery-powered systems, and DC power distribution modules requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across −40°C to 85°C.
Supply support for LTC1142HVCG-ADJ#PBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC1142HVCG-ADJ#PBF belongs to ADI's legacy Linear Technology power management portfolio, specifically designed for high-efficiency, dual-output DC/DC conversion in space-constrained, battery-sensitive applications where programmability, low IQ, and discrete FET flexibility are essential.
FAQ
What is the maximum input voltage rating for the LTC1142HVCG-ADJ#PBF?
The LTC1142HVCG-ADJ#PBF supports an absolute maximum input supply voltage of 20V on Pins 10 and 24. This HV rating distinguishes it from the standard LTC1142 (16V max) and LTC1142L (12V max), enabling direct operation from 18V nominal industrial supplies or 2-cell Li-ion stacks without pre-regulation. Operation above 18V is not recommended for sustained use due to thermal limits.
How do I configure the output voltages for the LTC1142HVCG-ADJ#PBF?
The LTC1142HVCG-ADJ#PBF uses two independent feedback pins - Pin 2 (VFB1) for output 1 and Pin 16 (VFB2) for output 2 - each connected to a resistive divider from its respective VOUT to ground. With an internal 1.25V reference, the output voltage is calculated as VOUT = 1.25V × (1 + R1/R2). For example, a 10kΩ top resistor and 3.92kΩ bottom resistor yields 4.48V. Both outputs can be set to different values simultaneously.
Does the LTC1142HVCG-ADJ#PBF support 100% duty cycle operation?
Yes, the LTC1142HVCG-ADJ#PBF supports true 100% duty cycle operation, enabling low-dropout regulation where VOUT closely tracks VIN (e.g., 4.95V out at VIN = 5.0V). This is achieved by disabling the off-time timer when VIN − VOUT falls below ~1.5V, holding the P-channel MOSFET continuously on. The feature eliminates the need for linear post-regulators in battery-powered end-of-life scenarios.
What is the typical quiescent current of the LTC1142HVCG-ADJ#PBF in Burst Mode™?
In Burst Mode™, the LTC1142HVCG-ADJ#PBF draws 160µA per regulator block - totaling 320µA for both channels - while maintaining regulation. This ultra-low IQ enables multi-day battery life in portable instrumentation. Shutdown mode reduces current further to 10µA per channel (20µA total) when both SHDN3 and SHDN5 are pulled high.
Can the two channels of the LTC1142HVCG-ADJ#PBF operate at different switching frequencies?
Yes, the LTC1142HVCG-ADJ#PBF allows independent frequency setting via separate CT pins: Pin 11 (CT5) for output 2 and Pin 25 (CT3) for output 1. Each CT capacitor sets the off-time for its respective channel, enabling asymmetric frequencies (e.g., 150kHz on output 1 and 220kHz on output 2) to minimize beat frequencies and EMI in sensitive analog systems.
LTC1142HVCG-ADJ#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3.5V ~ 18V
- Frequency - Switching:
- Up to 250kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
LTC1142HVCG-ADJ#PBF FAQ
1.How can I place an order for LTC1142HVCG-ADJ#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1142HVCG-ADJ#PBF 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 LTC1142HVCG-ADJ#PBF reliable?
The price and inventory of LTC1142HVCG-ADJ#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1142HVCG-ADJ#PBF is usually 5 days.
3.What payment methods are accepted for LTC1142HVCG-ADJ#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1142HVCG-ADJ#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1142HVCG-ADJ#PBF?
LTC1142HVCG-ADJ#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1142HVCG-ADJ#PBF 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 LTC1142HVCG-ADJ#PBF?
For technical support, including LTC1142HVCG-ADJ#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1142HVCG-ADJ#PBF requirements.
6.How does Aetrix verify that LTC1142HVCG-ADJ#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1142HVCG-ADJ#PBF 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 LTC1142HVCG-ADJ#PBF meets industry standards.
7.What is the process for return or replacement of LTC1142HVCG-ADJ#PBF?
All LTC1142HVCG-ADJ#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1142HVCG-ADJ#PBF, 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 LTC1142HVCG-ADJ#PBF part is unused and in its original packaging.
Return procedure for LTC1142HVCG-ADJ#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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