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Analog Devices Inc. LTC1142HVCG#PBF
- Part No.:
- LTC1142HVCG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1142HVCG#PBF.pdf
- Description:
- IC REG CTRLR BUCK 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,298
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Product details
Overview
LTC1142HVCG#PBF from Analog Devices (formerly Linear Technology) is a dual high-efficiency synchronous step-down switching regulator controller featuring two independent 3.3V/5V output channels, constant off-time current mode architecture, 250kHz max switching frequency, and Burst Mode™ operation enabling >95% efficiency at full load and 160µA per channel standby current. It drives external complementary P/N-MOSFET pairs for battery-powered portable instruments and DC power distribution systems.
For engineers reviewing the LTC1142HVCG#PBF datasheet, LTC1142HVCG#PBF pinout, LTC1142HVCG#PBF application, or LTC1142HVCG#PBF equivalent, key selection criteria include input voltage range (3.5V–20V), dual-output programmability, low dropout (100% duty cycle), micropower shutdown (<40µA total), and SSOP-28 package compatibility with high-density PCB layouts.
Technical Context
The LTC1142HVCG#PBF implements two fully independent constant off-time current mode regulators-each with dedicated CT pins (11, 25), ITH pins (13, 27), and dual-drive outputs (PDRIVE/NDRIVE) for synchronous P/N-FET control. Its architecture models inductor current decay via CT discharge proportional to VOUT, enabling stable regulation across wide VIN–VOUT differentials.
Burst Mode™ operation is triggered by output voltage hysteresis detection, disabling both FETs and reducing quiescent current to 160µA per channel while maintaining regulation via output capacitor hold-up. The device supports 100% duty cycle low-dropout operation when VIN approaches VOUT, limited only by external MOSFET RDS(ON) and sense resistor/inductor resistance.
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 & 5V - internally trimmed, ±3% accuracy over load/temperature for dual-rail systems |
| Max Switching Frequency | 250kHz - enables use of compact 50µH inductors and minimizes EMI in noise-sensitive applications |
| Standby Current | 160µA per channel - enables multi-day battery life in always-on portable instrumentation |
| Shutdown Current | <40µA total - ensures zero-load system power budget compliance during deep sleep modes |
| Current Sense Threshold | 25mV to 170mV - sets peak inductor current via external RSENSE (e.g., 0.05Ω for 2A max) |
| Thermal Limit | 125°C junction - allows operation in sealed enclosures with minimal heatsinking |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 0.635mm pitch, JEDEC MS-012AC compliant, body size 10.2mm × 5.3mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE+3 (1) | 3.3V section current sense (+) | Connects across RSENSE3 to set peak current trip threshold with built-in 25–170mV offset vs SENSE−3 |
| SHDN3 (2) | 3.3V section shutdown control | CMOS-compatible input; <0.8V = active, >2V = micropower shutdown (<40µA total) |
| 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 N-MOSFET source and (−) terminal of 3.3V input capacitor; carries high di/dt currents |
| NDRIVE3 (6) | 3.3V bottom N-MOSFET gate driver | High-current output (0V to VIN3 swing); drives Si9410DY-type logic-level N-FETs |
| PDRIVE5 (9) | 5V top P-MOSFET gate driver | High-current output (VIN5 to 0V swing); drives Si9430DY-type P-FETs |
| VIN5 (10) | 5V section input supply | Must be decoupled locally to PGND5 with ≥44µF ceramic + bulk capacitance |
| CT5 (11) | 5V section timing capacitor node | 390pF to ground sets ~250kHz freq; discharge current scales with VOUT5 for adaptive off-time |
| ITH5 (13) | 5V current comparator threshold adjust | Voltage on this pin raises current trip point - used for load-current tracking compensation |
| SENSE−5 (14) | 5V output voltage feedback (−) | Internal resistive divider reference; also (−) input to 5V current comparator |
| SENSE+5 (15) | 5V section current sense (+) | Connects across RSENSE5; offset with SENSE−5 defines current limit window |
| SHDN5 (16) | 5V section shutdown control | Independent CMOS shutdown pin; enables asymmetric power sequencing |
| PGND5 (18) | 5V power ground | Separate high-current return path for 5V section; must not share trace with SGND5 |
| NDRIVE5 (20) | 5V bottom N-MOSFET gate driver | 0V to VIN5 swing; complements PDRIVE5 for synchronous rectification |
| PDRIVE3 (23) | 3.3V top P-MOSFET gate driver | VIN3 to 0V swing; paired with NDRIVE3 for efficient 3.3V buck conversion |
| VIN3 (24) | 3.3V section input supply | Decoupled locally to PGND3; shares input rail with VIN5 in typical dual-supply designs |
| CT3 (25) | 3.3V section timing capacitor node | 560pF to ground sets ~250kHz freq; identical adaptive off-time behavior as CT5 |
| ITH3 (27) | 3.3V current comparator threshold adjust | Same function as ITH5 but for 3.3V section; enables independent load-current compensation |
| SENSE−3 (28) | 3.3V output voltage feedback (−) | Internal divider reference and current comparator (−) input; defines 3.3V regulation point |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulators | Enables simultaneous 3.3V/5V generation with separate shutdown, frequency, and current limit controls |
| Burst Mode™ operation | Maintains >85% efficiency down to 1mA load per channel while reducing IQ to 160µA/channel |
| Constant off-time current mode | Provides inherent line/load transient immunity and eliminates loop compensation complexity |
| 100% duty cycle low-dropout | Supports VIN as low as VOUT + 0.1V (limited only by RDS(ON) and PCB resistance) |
| Independent micropower shutdown | Each channel shuts down to <20µA, enabling selective rail disablement without affecting other outputs |
| SSOP-28 thermal performance | θJA = 95°C/W enables 1.5W dissipation at 70°C ambient without heatsink |
Applications
| Portable Medical Monitors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Battery-powered ECG and pulse oximeter units requiring isolated 3.3V analog front-end and 5V display backlight rails. IC Role / Device Role / Timing Role: Dual-output synchronous buck controller delivering regulated 3.3V/5V from single 7.4V Li-ion pack with Burst Mode™ extending runtime. Use Value: 160µA/channel standby current enables >72-hour battery life in sleep mode; 250kHz switching avoids audible noise in clinical environments. | Use Scenario: Ruggedized barcode scanners operating from 9–18V vehicle power with real-time decoding and wireless transmission. IC Role / Device Role / Timing Role: High-efficiency dual regulator powering 3.3V ARM Cortex-M4 MCU core and 5V RF transceiver module under dynamic load conditions. Use Value: Constant off-time architecture delivers <50µs load transient recovery; 20V absolute max rating withstands automotive load-dump spikes. |
| Test & Measurement Equipment | DC Power Distribution Systems |
Use Scenario: Portable oscilloscope modules needing precision 3.3V ADC reference and 5V FPGA I/O rails with ultra-low ripple. IC Role / Device Role / Timing Role: Dual synchronous buck controller driving low-RDS(ON) Si9430DY/Si9410DY FETs with 50µH shielded inductors. Use Value: Fixed 3.3V/5V outputs eliminate external feedback resistors; <50mVP-P ripple in Burst Mode™ ensures clean analog measurements. | Use Scenario: Rack-mounted telecom power shelves distributing 3.3V control logic and 5V interface power to multiple line cards. IC Role / Device Role / Timing Role: Dual-channel DC-DC controller supporting hot-swap input and independent enable sequencing across distributed loads. Use Value: Independent SHDN3/SHDN5 pins allow staggered power-up; 20V input rating accommodates 12V/24V backplane supplies. |
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 |
|---|---|---|---|
| LTC3717EGN#PBF | Single-channel, 4V–36V input, supports external VREF; no integrated Burst Mode™ | Requires external circuitry for dual-rail generation; higher BOM count for same functionality | Select when wider input range (>20V) or adjustable output voltages are required |
| TPS54290PWPR | Dual-channel, 5.5V–36V input, fixed 3.3V/5V outputs, 600kHz switching, no Burst Mode™ | Higher quiescent current (1.2mA vs 160µA); less suitable for battery-critical applications | Select when higher switching frequency and smaller magnetics are prioritized over ultra-low IQ |
Compared with LTC3717EGN#PBF and TPS54290PWPR, the LTC1142HVCG#PBF uniquely combines dual fixed 3.3V/5V outputs, 20V max input, Burst Mode™, and SSOP-28 packaging-making it optimal for space-constrained, battery-sensitive dual-rail systems where efficiency below 10mA load is critical.
Availability
LTC1142HVCG#PBF is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, and test & measurement equipment requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for LTC1142HVCG#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, acquired Linear Technology in 2017 to expand its power management portfolio.
The LTC1142HVCG#PBF belongs to ADI's legacy Linear Technology high-efficiency DC/DC controller family, designed specifically for dual-output, battery-operated portable electronics demanding ultralow quiescent current and robust light-load efficiency.
FAQ
What is the maximum input voltage rating for the LTC1142HVCG#PBF?
The LTC1142HVCG#PBF has an absolute maximum input supply voltage rating of 20V on pins 10 (VIN5) and 24 (VIN3), with operational range specified from 3.5V to 18V. This HV variant distinguishes itself from standard LTC1142 (16V max) and LTC1142L (12V max), making it suitable for 12V/24V industrial and automotive-derived power rails where transient tolerance is critical. Exceeding 20V risks permanent damage per Absolute Maximum Ratings.
Does the LTC1142HVCG#PBF support user-programmable output voltages?
No, the LTC1142HVCG#PBF provides fixed 3.3V and 5V outputs via internal resistive dividers connected to SENSE−3 (pin 28) and SENSE−5 (pin 14). For adjustable outputs, the pin-compatible LTC1142HVCG-ADJ variant must be used, which replaces those pins with VFB3/VFB5 inputs accepting external resistor dividers. The "CG" suffix denotes commercial-grade temperature range (0°C to 70°C), not adjustability.
How does Burst Mode™ operation improve efficiency at light loads in the LTC1142HVCG#PBF?
Burst Mode™ in the LTC1142HVCG#PBF disables both P- and N-MOSFET drivers when output voltage rises above regulation, entering micropower sleep mode (160µA per channel). Regulation is maintained solely by the output capacitor until voltage droop triggers a burst of switching cycles. This eliminates continuous switching losses, sustaining >85% efficiency down to 1mA load-unachievable in forced continuous mode where IQ exceeds 1.6mA per channel.
What external components are mandatory for basic operation of the LTC1142HVCG#PBF?
Four component types are mandatory: (1) Two RSENSE resistors (e.g., 0.05Ω) for current limiting on each channel; (2) Two CT timing capacitors (390pF for 5V, 560pF for 3.3V) setting switching frequency; (3) Four power MOSFETs (two P-channel, two N-channel, e.g., Si9430DY/Si9410DY); and (4) Two output inductors (e.g., 50µH). Input/output capacitors and optional ITH/INTVCC decoupling are also required for stability and noise suppression.
Can the LTC1142HVCG#PBF drive MOSFETs with gate thresholds above 3V?
Yes-the LTC1142HVCG#PBF's PDRIVE outputs swing from VIN to ground (e.g., 12V → 0V), fully enhancing standard logic-level P-MOSFETs (VGS(th) ≤ 2.5V) and many 3.3V-threshold devices. Its NDRIVE outputs swing from 0V to VIN, ensuring robust turn-on of N-MOSFETs even with 3V thresholds. However, for 4V+ threshold N-FETs, a charge pump or level-shifter is required-neither is integrated into the LTC1142HVCG#PBF.
LTC1142HVCG#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#PBF FAQ
1.How can I place an order for LTC1142HVCG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1142HVCG#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#PBF reliable?
The price and inventory of LTC1142HVCG#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#PBF is usually 5 days.
3.What payment methods are accepted for LTC1142HVCG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1142HVCG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1142HVCG#PBF?
LTC1142HVCG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1142HVCG#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#PBF?
For technical support, including LTC1142HVCG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1142HVCG#PBF requirements.
6.How does Aetrix verify that LTC1142HVCG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1142HVCG#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#PBF meets industry standards.
7.What is the process for return or replacement of LTC1142HVCG#PBF?
All LTC1142HVCG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1142HVCG#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#PBF part is unused and in its original packaging.
Return procedure for LTC1142HVCG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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