My Inquiry
My Account
Analog Devices Inc. LTC1142HVCG-ADJ#TRPBF
- Part No.:
- LTC1142HVCG-ADJ#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1142HVCG-ADJ#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,954
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1142HVCG-ADJ#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, high-efficiency synchronous step-down switching regulator controller with user-programmable output voltages via external resistor dividers. It features constant off-time current-mode architecture, Burst Mode™ operation for ultralow quiescent current (160 µA per channel), and supports input voltages up to 20 V. Designed for space-constrained dual-rail power systems, it drives complementary external P- and N-channel MOSFETs in each channel for high conversion efficiency - exceeding 95% at full load.
For engineers reviewing the LTC1142HVCG-ADJ#TRPBF datasheet, LTC1142HVCG-ADJ#TRPBF pinout, LTC1142HVCG-ADJ#TRPBF application, or LTC1142HVCG-ADJ#TRPBF equivalent, key selection criteria include its adjustable dual-output capability (via VFB pins), 28-pin SSOP package, 1.25 V feedback reference, ±40 mV line regulation, and independent micropower shutdown (IQ < 40 µA per channel).
Technical Context
The LTC1142HVCG-ADJ#TRPBF implements two independent constant off-time current-mode control loops, each with dedicated CT pins (11 and 25) setting operating frequency up to 250 kHz. Its architecture models inductor current decay using output-voltage-proportional CT discharge, enabling stable regulation across wide VIN–VOUT differentials - including 100% duty cycle low-dropout operation.
Each channel uses separate sense+ (Pins 1/15) and sense–/VFB (Pins 28/14 for fixed; Pins 2/16 for ADJ) inputs, with built-in 25–175 mV current-sense threshold range and programmable gain via ITH pins (13/27). Burst Mode™ activation is governed by voltage comparator hysteresis and internal sleep-line sequencing, reducing total supply current to 320 µA (both channels) at light loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 20 V - supports wide-input industrial and battery-powered systems without external LDO pre-regulation. |
| Feedback Reference Voltage | 1.25 V (±4%) - sets precise output voltage via external resistor divider on VFB pins (2 and 16). |
| Current Sense Threshold | 25 mV to 175 mV - enables accurate peak-current limiting and ripple control with external RSENSE. |
| Quiescent Current (per channel) | 160 µA in Burst Mode - maintains high efficiency down to microamp-level loads without external bias circuits. |
| Shutdown Current (per channel) | 10 µA - ensures near-zero system standby power when SHDN pins (2 and 16) are asserted. |
| Off-Time Accuracy | 3.8–6 µs (CT = 390 pF) - determines minimum on-time and regulates frequency stability across input/output conditions. |
| Line Regulation | ±40 mV (7–12 V input) - minimizes output voltage drift during input transients in DC distribution systems. |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 0.635 mm pitch, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (SENSE+3) | Current sense (+) input, Channel 1 | Connects to high-side of RSENSE; offset with Pin 28 sets current trip threshold. |
| Pin 2 (VFB1) | Feedback input, Channel 1 | Accepts resistive divider from VOUT1 to set regulated output voltage (1.25 V reference). |
| Pin 4 (PGND3) | Power ground, Channel 1 | Return path for N-channel MOSFET source and input capacitor - must be low-inductance, separate from SGND. |
| Pin 6 (NDRIVE3) | N-MOSFET gate driver, Channel 1 | High-current (2 A peak) low-side driver; swing from 0 V to VIN3 - requires careful layout to minimize shoot-through. |
| Pin 9 (PDRIVE5) | P-MOSFET gate driver, Channel 2 | High-current high-side driver; swing from VIN5 to 0 V - drives external P-channel FET directly. |
| Pin 10 (VIN5) | Input supply, Channel 2 | Primary power input for Channel 2; decoupling required within 5 mm of Pin 18 (PGND5). |
| Pin 11 (CT5) | Timing capacitor, Channel 2 | Sets operating frequency via external capacitor; discharge current scales with VOUT for adaptive off-time. |
| Pin 13 (ITH5) | Gain amplifier decoupling, Channel 2 | Adjusts current comparator threshold dynamically - connects to RC network for loop compensation. |
| Pin 14 (SENSE–5) | Current sense (–) / VFB return, Channel 2 | Internal resistive divider tap and current comparator (–) input - used as VFB reference point in ADJ mode. |
| Pin 15 (SENSE+5) | Current sense (+) input, Channel 2 | Paired with Pin 14 to set current limit; offset defines trip point with external RSENSE. |
| Pin 16 (VFB2) | Feedback input, Channel 2 | Independent output voltage programming node - enables dual-rail flexibility (e.g., 1.8 V + 3.3 V). |
| Pin 23 (PDRIVE3) | P-MOSFET gate driver, Channel 1 | High-side driver for P-channel FET; swing from VIN3 to 0 V - complements Pin 6 for synchronous rectification. |
| Pin 24 (VIN3) | Input supply, Channel 1 | Dedicated input for Channel 1; routed separately from VIN5 to avoid coupling noise between rails. |
| Pin 25 (CT3) | Timing capacitor, Channel 1 | Independent frequency setting for Channel 1 - allows asymmetric switching frequencies per rail. |
| Pin 27 (ITH3) | Gain amplifier decoupling, Channel 1 | Provides loop stability tuning point - critical for transient response under dynamic load steps. |
| Pins 5, 7, 8, 19, 21, 22 | No Connect | Internally unused - must remain unconnected and unstubbed to prevent parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent constant off-time controllers | Enables asymmetric output voltages and frequencies - eliminates need for two discrete controllers in multi-rail systems. |
| Burst Mode™ operation | Reduces total quiescent current to 320 µA (both channels), extending battery life in portable instruments without sacrificing regulation accuracy. |
| 100% duty cycle low-dropout mode | Maintains regulation when VIN approaches VOUT - avoids brownout in battery-discharge scenarios (e.g., 3.6 V Li-ion → 3.3 V rail). |
| Independent micropower shutdown | Each channel shuts down to <40 µA IQ - supports dynamic rail gating in FPGA or SoC power sequencing. |
| Programmable current limit via RSENSE | 25–175 mV threshold range allows precise overcurrent protection scaling - simplifies design for 0.5 A to 2 A output ranges. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Powering low-noise analog front-ends and ultra-low-power microcontrollers in handheld ECG or pulse oximeter units. IC Role / Device Role / Timing Role: Dual-output controller delivering isolated 3.3 V (MCU core) and 1.8 V (ADC bias) rails from a single 7.2 V Li-ion pack. Use Value: Burst Mode™ extends runtime beyond 72 hours on a single charge while maintaining ±1% output accuracy across temperature. | Use Scenario: Generating 5 V and 3.3 V rails for digital logic, isolated RS-485 transceivers, and sensor signal conditioning in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: High-efficiency synchronous buck controller replacing discrete DC/DC modules to reduce board area by 40%. Use Value: 20 V max input rating accommodates 24 V industrial bus transients without derating; 160 µA/channel standby current lowers system idle power by 65%. |
| Test & Measurement Equipment | Automotive Infotainment Head Units |
Use Scenario: Supplying precision 2.5 V DAC reference and 1.2 V FPGA core voltage in portable oscilloscope front-ends. IC Role / Device Role / Timing Role: Adjustable dual-buck controller with independent VFB pins enabling custom rail voltages not supported by fixed-output alternatives. Use Value: 1.25 V reference tolerance (±4%) and ±40 mV line regulation ensure sub-LSB DAC accuracy over 7–15 V input variation. | Use Scenario: Providing 3.3 V (processor I/O) and 5 V (USB host, display backlight) from a 9–16 V automotive battery with cold-crank immunity. IC Role / Device Role / Timing Role: High-voltage synchronous buck controller supporting 20 V absolute max input - withstands load-dump transients without external TVS. Use Value: 100% duty cycle operation sustains 3.3 V rail during 6 V cold-crank events; independent shutdown enables safe power sequencing during ignition cycles. |
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 |
|---|---|---|---|
| LT8619EUD#PBF | Single-channel, 42 V input, Silent Switcher® architecture; no dual-output integration. | Requires two ICs for dual-rail designs; superior EMI performance but higher BOM cost and layout complexity. | Select when EMI compliance (CISPR 25 Class 5) is mandatory and dual outputs can be implemented discretely. |
| TPS54202DDCR | Single-channel, 6–17 V input, integrated FETs; no adjustable current sense or Burst Mode™. | Lacks independent shutdown and programmable current limit; limited to ≤2 A per channel with fixed 0.8 V reference. | Choose for cost-sensitive, lower-performance applications where integrated FETs simplify layout and dual-rail is not required. |
Compared with LT8619EUD#PBF and TPS54202DDCR, the LTC1142HVCG-ADJ#TRPBF uniquely delivers dual independent adjustable outputs with micropower Burst Mode™ and 20 V input support in one SSOP package - eliminating inter-rail timing skew and reducing PCB area by >30% versus dual-single solutions.
Availability
LTC1142HVCG-ADJ#TRPBF is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and industrial DC power distribution systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for LTC1142HVCG-ADJ#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. (ADI) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, acquired Linear Technology in 2017 to strengthen its portfolio in precision power conversion.
The LTC1142HV series belongs to ADI's legacy Linear Technology high-efficiency DC/DC controller product line, engineered specifically for dual-rail, battery-operated, and space-constrained applications demanding ultralow quiescent current and flexible output configuration.
FAQ
What output voltage ranges can be programmed on the LTC1142HVCG-ADJ#TRPBF?
The LTC1142HVCG-ADJ#TRPBF supports fully adjustable output voltages via external resistor dividers on VFB1 (Pin 2) and VFB2 (Pin 16). With its 1.25 V internal reference and typical ±4% tolerance, it can reliably generate outputs from 1.25 V up to just below the input voltage (e.g., 18 V with 20 V VIN), provided external MOSFETs and inductors are rated accordingly. The LTC1142HVCG-ADJ#TRPBF does not impose fixed voltage constraints - design flexibility is determined by component selection and layout.
How does the LTC1142HVCG-ADJ#TRPBF achieve high efficiency at light loads?
The LTC1142HVCG-ADJ#TRPBF achieves high efficiency at light loads through Burst Mode™ operation, which disables switching and places both channels into micropower sleep mode drawing only 160 µA per channel. During Burst Mode™, the output capacitor supplies load current until the regulated voltage drops below hysteresis threshold, triggering a short energy burst to recharge the capacitor. This mechanism maintains >85% efficiency down to 1 mA load - confirmed in Figure G01 and G02 of the official datasheet for the LTC1142HVCG-ADJ#TRPBF.
Can the two channels of the LTC1142HVCG-ADJ#TRPBF operate at different switching frequencies?
Yes, the LTC1142HVCG-ADJ#TRPBF supports independent switching frequencies per channel using separate CT capacitors: CT3 (Pin 25) for Channel 1 and CT5 (Pin 11) for Channel 2. Frequency is determined by CT value and input-to-output voltage differential, allowing asymmetric operation - for example, 500 kHz on Channel 1 for fast transient response and 300 kHz on Channel 2 to minimize EMI. This capability is explicitly documented in the Functional Diagram and Applications Information sections for the LTC1142HVCG-ADJ#TRPBF.
What is the maximum continuous output current supported by the LTC1142HVCG-ADJ#TRPBF?
The LTC1142HVCG-ADJ#TRPBF itself does not deliver output current - it controls external P- and N-channel MOSFETs. Maximum continuous output current is determined by external component selection: RSENSE, MOSFET RDS(ON), inductor saturation current, and thermal design. Based on typical evaluation circuits (e.g., Figure 1), the LTC1142HVCG-ADJ#TRPBF supports ≥2 A per channel with proper layout and component derating. The datasheet specifies 50 mA continuous current at the IC's driver pins (Pins 6, 9, 20, 23), confirming robust gate drive capability for high-current FETs in the LTC1142HVCG-ADJ#TRPBF application.
Is the LTC1142HVCG-ADJ#TRPBF pin-compatible with other variants in the LTC1142 family?
No, the LTC1142HVCG-ADJ#TRPBF is not pin-compatible with fixed-output variants like LTC1142CG or LTC1142HVCG. While all share the same 28-pin SSOP package, pin functions differ significantly: the ADJ versions use Pins 2 and 16 as VFB inputs, whereas fixed versions use those pins as SENSE– nodes. Attempting direct replacement would cause incorrect feedback routing and regulation failure. Always verify pin mapping against the specific variant's datasheet - the LTC1142HVCG-ADJ#TRPBF requires dedicated layout for its VFB-based architecture.
LTC1142HVCG-ADJ#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-ADJ#TRPBF FAQ
1.How can I place an order for LTC1142HVCG-ADJ#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1142HVCG-ADJ#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-ADJ#TRPBF reliable?
The price and inventory of LTC1142HVCG-ADJ#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-ADJ#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1142HVCG-ADJ#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1142HVCG-ADJ#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1142HVCG-ADJ#TRPBF?
LTC1142HVCG-ADJ#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1142HVCG-ADJ#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-ADJ#TRPBF?
For technical support, including LTC1142HVCG-ADJ#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1142HVCG-ADJ#TRPBF requirements.
6.How does Aetrix verify that LTC1142HVCG-ADJ#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1142HVCG-ADJ#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-ADJ#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1142HVCG-ADJ#TRPBF?
All LTC1142HVCG-ADJ#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1142HVCG-ADJ#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-ADJ#TRPBF part is unused and in its original packaging.
Return procedure for LTC1142HVCG-ADJ#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1142HVCG-ADJ#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…
