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Analog Devices Inc. LTC1142HVCG#TRPBF
- Part No.:
- LTC1142HVCG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1142HVCG#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
LTC1142HVCG#TRPBF from Analog Devices (formerly Linear Technology) is a dual high-efficiency synchronous step-down switching regulator controller, composed of two independent constant off-time current-mode regulator blocks driving external complementary MOSFETs. It delivers fixed 3.3V/2A and 5V/2A outputs, supports 3.5V–20V input, achieves >95% efficiency, and maintains ultralow 160µA/output standby current in Burst Mode™ - ideal for space-constrained dual-rail battery-powered systems.
For engineers reviewing the LTC1142HVCG#TRPBF datasheet, LTC1142HVCG#TRPBF pinout, LTC1142HVCG#TRPBF application, or LTC1142HVCG#TRPBF equivalent, key selection considerations include its dual-output fixed-voltage configuration, 28-pin SSOP package with independent shutdown pins (SHDN3/SHDN5), 250kHz max switching frequency, and compatibility with standard P-CH/N-CH MOSFET pairs such as Si9430DY/Si9410DY.
Technical Context
The LTC1142HVCG#TRPBF implements two fully independent current-mode control loops using constant off-time architecture, where each section (3.3V and 5V) uses separate CT pins (25, 11), ITH pins (27, 13), and sense inputs (SENSE+3/SENSE–3, SENSE+5/SENSE–5) to regulate output voltage and current. Off-time is dynamically adjusted based on VOUT to stabilize frequency near dropout.
Burst Mode™ operation is automatically engaged below ~10mA load per channel, reducing quiescent current to 160µA/output by disabling switching and relying on output capacitance; regulation resumes when output drops below hysteresis threshold. Each regulator block features independent micropower shutdown (IQ < 40µA), 100% duty cycle low-dropout capability, and built-in current-sense threshold offset (25mV to 175mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 20V - supports wide-input battery and industrial DC rails without pre-regulation. |
| Output Voltages | Fixed 3.3V ±3% and 5V ±2% - internally trimmed; no external feedback resistors required. |
| Max Output Current | 2A per channel - determined by external RSENSE (0.05Ω typical) and MOSFET selection. |
| Efficiency | >95% at full load - achieved via synchronous rectification and Burst Mode™ optimization across 3 decades of load current. |
| Quiescent Current | 160µA per regulator in Burst Mode™ - enables multi-day runtime in always-on portable instrumentation. |
| Switching Frequency | Up to 250kHz - set per channel by external CT capacitor (e.g., 390pF for 5V section); frequency decreases as VIN approaches VOUT. |
| Shutdown Current | <40µA total - achieved with independent SHDN3/SHDN5 logic-level inputs (0.55V–2V threshold). |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 0.025" pitch, JEDEC MS-013AC compliant. Thermal resistance θJA = 95°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE+3 (1) | 3.3V section current sense positive input | Connects across RSENSE3 to detect peak inductor current; 25mV–175mV threshold range sets current limit. |
| SHDN3 (2) | 3.3V section shutdown control | CMOS-compatible input; <0.55V = active, >2V = micropower shutdown (IQ < 40µA). |
| SGND3 (3) | 3.3V small-signal ground | Must be routed separately to (–) terminal of 3.3V output capacitor to avoid noise coupling. |
| PGND3 (4) | 3.3V power ground | Connects to source of N-channel MOSFET and (–) terminal of 3.3V input capacitor; handles high di/dt currents. |
| NDRIVE3 (6) | 3.3V bottom N-MOSFET gate driver | High-current output (ground to VIN3 swing); drives Si9410DY-type devices with <200ns transition time. |
| PDRIVE5 (9) | 5V top P-MOSFET gate driver | High-current output (VIN5 to ground swing); compatible with Si9430DY; requires low-inductance layout. |
| VIN5 (10) | 5V section input supply | Must be decoupled locally to PGND5 with ≥44µF ceramic + bulk capacitance to suppress switching noise. |
| CT5 (11) | 5V section timing capacitor connection | 390pF to ground sets nominal frequency; actual fSW varies with VIN–VOUT per constant off-time law. |
| ITH5 (13) | 5V current comparator threshold bias | DC voltage here scales current-sense threshold linearly - used for load-current tracking compensation. |
| SENSE–5 (14) | 5V section voltage feedback & current sense negative | Internal resistive divider sets 5V output; also serves as (–) input for current comparator. |
| SENSE+5 (15) | 5V section current sense positive input | Paired with Pin 14 across RSENSE5; same 25mV–175mV threshold range as Pin 1. |
| SHDN5 (16) | 5V section shutdown control | Independent logic-level shutdown pin; identical electrical specs to Pin 2. |
| PGND5 (18) | 5V power ground | Separate high-current return path for 5V section; must not share trace with SGND5 or other grounds. |
| NDRIVE5 (20) | 5V bottom N-MOSFET gate driver | Matches Pin 6 functionality for 5V channel; drives N-FET with rail-to-rail swing. |
| PDRIVE3 (23) | 3.3V top P-MOSFET gate driver | Drives P-FET (e.g., Si9430DY) with VIN3-to-ground swing; requires tight layout to minimize shoot-through risk. |
| VIN3 (24) | 3.3V section input supply | Decoupled locally to PGND3; shares input rail with VIN5 in dual-supply designs but requires independent filtering. |
| CT3 (25) | 3.3V section timing capacitor connection | 560pF to ground (per Figure 1) sets nominal frequency for 3.3V channel; tracks same CT vs fSW relationship as Pin 11. |
| ITH3 (27) | 3.3V current comparator threshold bias | DC bias point for gain amplifier; adjusts current limit in proportion to load for improved transient response. |
| SENSE–3 (28) | 3.3V section voltage feedback & current sense negative | Internal divider sets 3.3V output; also (–) input for 3.3V current comparator - functionally identical to Pin 14. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent constant off-time regulators | Enables simultaneous 3.3V/5V generation with no cross-regulation; each section operates autonomously with dedicated CT/ITH/SENSE pins. |
| Burst Mode™ with 160µA/output quiescent current | Extends battery life in portable instruments by eliminating switching losses at light loads while maintaining tight output regulation. |
| 100% duty cycle low-dropout operation | Allows VOUT to track VIN down to ~100mV dropout, enabling operation during brownout or deep battery discharge without reset. |
| Synchronous P-CH/N-CH MOSFET drive | Eliminates external Schottky losses; supports standard logic-level MOSFETs (Si9430DY/Si9410DY) with integrated shoot-through protection. |
| Independent micropower shutdown (SHDN3/SHDN5) | Permits selective power gating of either rail - e.g., disable 5V subsystem while retaining 3.3V real-time clock or sensor bias. |
| Wide 3.5V–20V input range with 20V absolute max | Supports 2-cell Li-ion (8.4V), 3-cell Li-ion (12.6V), and 12V/18V industrial rails without external overvoltage protection. |
Applications
| Portable Medical Monitors | Notebook Subsystem Power |
|---|---|
|
Use Scenario: Dual-rail power for ARM-based patient monitor with ECG front-end (3.3V) and display backlight driver (5V), operating from 2S Li-ion battery. IC Role / Device Role / Timing Role: Primary dual-output DC/DC controller managing both rails, providing Burst Mode™ efficiency during sleep and fast transient response during data acquisition. Use Value: Enables >72-hour battery life with continuous monitoring and eliminates need for discrete LDOs or secondary converters. |
Use Scenario: Compact 3.3V/5V supply for embedded controller, USB interface, and fan driver in ultra-thin notebook baseboard. IC Role / Device Role / Timing Role: Dual synchronous buck controller delivering regulated rails with independent enable control and shared input filtering. Use Value: Reduces BOM count by replacing two discrete controllers; SSOP package fits tight layout constraints near CPU VRM. |
| Handheld Test Equipment | Industrial IoT Edge Node |
|
Use Scenario: Battery-powered multimeter with isolated analog front-end (3.3V) and Bluetooth LE radio (5V), requiring low-noise, low-quiescent power. IC Role / Device Role / Timing Role: Dual-output regulator with separate ground planes (SGND3/SGND5) minimizing digital noise coupling into precision ADC reference paths. Use Value: Achieves 16-bit measurement accuracy by isolating sensitive analog ground from noisy 5V radio switching node. |
Use Scenario: Remote sensor node powered by solar-charged LiFePO₄ (9–16V), supplying 3.3V MCU and 5V RS-485 transceiver. IC Role / Device Role / Timing Role: High-input-voltage dual buck controller supporting wide VIN range and robust 100% duty cycle operation during low-light conditions. Use Value: Eliminates need for pre-regulator stage; maintains communication link even when battery drops to 9.5V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8609S | Single-channel, 42V input, integrated MOSFETs; no dual-output capability; higher IQ (2.5µA) but no Burst Mode™ | Requires two ICs for dual-rail; better suited for high-VIN single-output apps (e.g., automotive) | Select only if input >20V or integrated FETs are mandatory; not a functional replacement for LTC1142HVCG#TRPBF's dual fixed-output architecture. |
| TPS54202 | Single-channel, 6V max input, integrated FETs, adjustable output; no Burst Mode™; 100µA IQ | Cannot support 20V input or fixed dual outputs; lacks independent shutdown and CT-based frequency tuning | Consider only for low-input, single-rail cost-sensitive designs; incompatible with LTC1142HVCG#TRPBF's 3.5V–20V dual fixed-output use case. |
Compared with LT8609S and TPS54202, the LTC1142HVCG#TRPBF uniquely integrates two independent fixed-output controllers in one SSOP package with Burst Mode™, 20V rating, and external MOSFET flexibility - making it irreplaceable for compact dual-rail battery systems requiring >95% efficiency across full load range.
Availability
LTC1142HVCG#TRPBF is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and DC power distribution systems requiring stable component supply, long-lifecycle availability, and guaranteed parametric performance across –40°C to 85°C.
Supply support for LTC1142HVCG#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1142HVCG#TRPBF belongs to Linear's legacy high-efficiency DC/DC controller product line, designed specifically for dual-output, battery-operated portable electronics where board space, efficiency across load range, and low-noise regulation are critical.
FAQ
What is the maximum input voltage rating for the LTC1142HVCG#TRPBF?
The LTC1142HVCG#TRPBF has an absolute maximum input voltage rating of 20V on Pins 10 and 24, with recommended operating range from 3.5V to 18V. This HV variant extends the input range beyond the standard LTC1142 (16V max), enabling direct use with 3S Li-ion (12.6V) and 18V industrial rails without derating. Exceeding 20V risks permanent damage per Absolute Maximum Ratings.
Does the LTC1142HVCG#TRPBF support adjustable output voltages?
No - the LTC1142HVCG#TRPBF is the fixed-output version delivering precisely trimmed 3.3V and 5V outputs. Adjustable variants exist (e.g., LTC1142HVCG-ADJ), which replace internal resistive dividers with external VFB pins (Pins 2 and 16), but the LTC1142HVCG#TRPBF itself has no provision for output adjustment and requires no external feedback resistors.
How does Burst Mode™ operation reduce power consumption in the LTC1142HVCG#TRPBF?
In Burst Mode™, the LTC1142HVCG#TRPBF disables switching when load current drops below ~10mA per channel, reducing quiescent current to 160µA/output. The output capacitor supplies load current until VOUT drops below hysteresis threshold, then a single switching cycle restores regulation. This eliminates switching and gate-drive losses, extending battery life significantly in intermittent-use applications like handheld meters.
What external components are required for basic operation of the LTC1142HVCG#TRPBF?
Each regulator section of the LTC1142HVCG#TRPBF requires: two complementary MOSFETs (e.g., Si9430DY P-CH + Si9410DY N-CH), one current-sense resistor (RSENSE = 0.05Ω typical), one timing capacitor (CT3 = 560pF, CT5 = 390pF), one output inductor (50µH), input/output capacitors (CIN ≥44µF, COUT ≥440µF), and local decoupling for INTVCC pins. No feedback resistors are needed for fixed outputs.
Can the LTC1142HVCG#TRPBF operate with 100% duty cycle, and what is the minimum dropout voltage?
Yes - the LTC1142HVCG#TRPBF supports true 100% duty cycle operation, allowing VOUT to track VIN down to approximately 100mV dropout (limited by RDS(ON) of external P-MOSFET and inductor DCR). This enables continued regulation during deep battery discharge or low-input conditions where conventional buck controllers would fail, preserving system uptime in portable equipment.
LTC1142HVCG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC1142HVCG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1142HVCG#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 LTC1142HVCG#TRPBF reliable?
The price and inventory of LTC1142HVCG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1142HVCG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1142HVCG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1142HVCG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1142HVCG#TRPBF?
LTC1142HVCG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1142HVCG#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 LTC1142HVCG#TRPBF?
For technical support, including LTC1142HVCG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1142HVCG#TRPBF requirements.
6.How does Aetrix verify that LTC1142HVCG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1142HVCG#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 LTC1142HVCG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1142HVCG#TRPBF?
All LTC1142HVCG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1142HVCG#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 LTC1142HVCG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1142HVCG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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