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Analog Devices Inc. LTC3834IGN-1#TRPBF
- Part No.:
- LTC3834IGN-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3834IGN-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,510
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Product details
Overview
LTC3834IGN-1#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, constant-frequency current-mode synchronous step-down controller driving dual N-channel MOSFETs. It delivers 0.8V to 10V adjustable output voltage from 4V–36V input, achieves ±1% output accuracy, operates down to 30μA quiescent current, and supports phase-lockable switching frequencies from 140kHz to 650kHz - ideal for battery-powered telecom and automotive power systems requiring ultra-low IQ and wide VIN range.
For engineers reviewing the LTC3834IGN-1#TRPBF datasheet, LTC3834IGN-1#TRPBF pinout, LTC3834IGN-1#TRPBF application, or LTC3834IGN-1#TRPBF equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative parts with documented functional and packaging differences - all derived from official Linear Technology documentation and Analog Devices product specifications.
Technical Context
The LTC3834IGN-1#TRPBF implements a constant-frequency current-mode control architecture with OPTI-LOOP® compensation, enabling stable transient response across diverse output capacitance and ESR values. Its error amplifier drives the ITH pin to regulate peak inductor current via a precision 0.8V reference and differential current sense inputs (SENSE+, SENSE−).
It features three selectable light-load operating modes - Burst Mode® (30μA IQ), pulse-skipping, or forced continuous conduction - controlled by the PLLIN/MODE pin. Output overvoltage protection triggers at +10% VFB deviation, and dropout operation sustains up to 99% duty cycle with internal CB recharge management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4V to 36V - supports 12V/24V automotive, telecom rectified, and multi-cell battery inputs without external regulators. |
| IQ (No Load) | 30μA - extends runtime in always-on battery systems such as telematics or remote sensors. |
| VOUT Accuracy | ±1% over temperature - ensures reliable regulation for FPGA core supplies and ADC reference rails. |
| Switching Frequency | 140kHz to 650kHz (phase-lockable) - enables optimization of inductor size vs. efficiency in space-constrained designs. |
| Duty Cycle Max | 99.4% - supports ultra-low dropout operation (e.g., 5V→4.95V) without external LDO post-regulation. |
| Output Voltage Range | 0.8V to 10V (adjustable) - covers DDR memory, DSP cores, and industrial I/O voltage requirements. |
| Package | 16-Lead Plastic SSOP - surface-mount compatible with standard reflow profiles and optical inspection. |
Pinout & Package
Package: 16-Lead Plastic SSOP (GN), –40°C to +85°C operating temperature range. Exposed pad not present (unlike DHC variant); SGND connection routed internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PLLLPF (Pin 1) | PLL low-pass filter node | Configures nominal frequency (250/400/530kHz) when tied to GND/float/INTVCC; connects to R-C filter for external sync. |
| ITH (Pin 2) | Error amplifier output & compensation point | Sets peak inductor current threshold; used for loop compensation and soft-start ramp control. |
| TRACK/SS (Pin 3) | Soft-start / tracking input | Internally pulled up at 1μA; controls VOUT ramp rate via external capacitor or tracks another supply via resistor divider. |
| VFB (Pin 4) | Feedback input | Compares against 0.8V reference; regulates output using external resistive divider - enables precise voltage setting. |
| SGND (Pin 5) | Small-signal ground | Must be isolated from PGND to prevent noise coupling into feedback and error amplifier paths. |
| PGND (Pin 6) | Power ground | Return path for bottom MOSFET source, Schottky anode, and CIN negative terminal - critical for current sense integrity. |
| BG (Pin 7) | Bottom gate driver output | Drives synchronous N-MOSFET from 0V to INTVCC (5.25V); requires low-inductance layout to minimize shoot-through risk. |
| INTVCC (Pin 8) | Internal LDO output | 5.25V ±2.5%, powers drivers and logic; requires ≥4.7μF ceramic/tantalum decoupling to PGND. |
| VIN (Pin 9) | Main input supply | Accepts 4V–36V; bypassed to SGND with local ceramic capacitor to suppress high-frequency noise. |
| SW (Pin 10) | Switch node | Connects to inductor; swings from ~–0.3V (Schottky drop) to VIN - high dV/dt node requiring tight layout. |
| TG (Pin 11) | Top gate driver output | Floating driver output referenced to SW; swing = INTVCC – 0.5V above SW - demands bootstrap capacitor (CB) between BOOST and SW. |
| BOOST (Pin 12) | Bootstrap supply | Charged via external Schottky diode from INTVCC; sustains TG drive during high-duty-cycle operation. |
| RUN (Pin 13) | Enable/shutdown control | Logic-level input: <0.7V disables controller (IQ = 4μA); >0.9V enables - compatible with microcontroller GPIO. |
| SENSE– (Pin 14) | Current sense negative input | Differential input to current comparator; common-mode range = SGND to 10V - supports high-side sensing. |
| SENSE+ (Pin 15) | Current sense positive input | Paired with SENSE–; sets current limit threshold (85–115mV) based on RSENSE and ITH voltage. |
| PLLIN/MODE (Pin 16) | Sync input / light-load mode select | DC bias selects Burst Mode® (<0.7V), pulse-skipping (0.9V–INTVCC–0.5V), or forced continuous (tied to INTVCC). |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Enables stable loop response across wide COUT/ESR variations without redesigning compensation network. |
| Adjustable Soft-Start / Tracking | Eliminates inrush current and ensures orderly power-up sequencing with other rails via TRACK/SS pin. |
| Output Overvoltage Protection | Hardware-based shutdown at +10% VFB deviation - protects downstream ICs without software intervention. |
| Very Low Dropout Operation | 99.4% max duty cycle allows VOUT within 50mV of VIN, reducing need for cascaded regulators. |
| Selectably Efficient Light-Load Modes | 30μA IQ in Burst Mode®, versus <100μA in pulse-skipping - preserves battery life while maintaining low ripple. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Powers 3.3V/5V rails for display controllers and CAN transceivers in head units with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating from 6V–16V battery input; manages startup sequencing via TRACK/SS. Use Value: 30μA IQ extends backup battery life during vehicle sleep mode; 4V–36V input handles load-dump and cold-crank transients. |
Use Scenario: Generates isolated 5V and 3.3V supplies for analog input conditioning and microcontroller cores in modular I/O cards. IC Role / Device Role / Timing Role: High-accuracy (±1%) step-down controller delivering stable voltage despite varying fieldbus loads and ambient temperature shifts. Use Value: ±1% VOUT accuracy ensures sensor measurement integrity; 99.4% duty cycle supports 5.5V→5V conversion without dropout. |
| Telecom Remote Radio Unit | Portable Medical Diagnostic Device |
|
Use Scenario: Supplies 12V and 5V rails to RF amplifiers and baseband FPGAs in outdoor small cells powered by PoE or solar-charged batteries. IC Role / Device Role / Timing Role: Dual-phase-capable controller (via synchronization) minimizing EMI in dense RF environments; uses PLLIN/MODE for clock alignment. Use Value: Phase-lockable 140kHz–650kHz operation avoids interference with LTE/5G bands; 30μA IQ extends solar-battery autonomy. |
Use Scenario: Powers imaging ASICs and precision ADCs in handheld ultrasound devices requiring ultra-low noise and long battery runtime. IC Role / Device Role / Timing Role: Low-noise synchronous controller operating in forced continuous mode to suppress audible switching artifacts near audio-sensitive circuits. Use Value: Pulse-skipping or forced continuous mode eliminates burst-mode acoustic noise; ±1% accuracy maintains diagnostic signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3834EDHC-1#TRPBF | Same die, 5mm × 3mm DFN package with exposed thermal pad (Pin 17 = SGND); θJA = 43.5°C/W vs. 90°C/W for GN. | Better thermal performance in high-current or high-ambient designs; requires PCB thermal pad soldering. | Choose for >3A output or >70°C ambient; avoid if SSOP footprint is fixed or thermal pad assembly is unavailable. |
| LTC3833IGN#TRPBF | Non–LTC3834-1 variant: includes PGOOD, CLKOUT, and EXTVCC pins; higher pin count (20-pin QFN); no TRACK/SS pin. | Supports power-good signaling and external bias for improved efficiency at high VIN; lacks soft-start/tracking capability. | Choose when system-level sequencing or status reporting is required; avoid when soft-start control or footprint compatibility with LTC3834IGN-1#TRPBF is mandatory. |
Compared with LTC3834EDHC-1#TRPBF, the LTC3834IGN-1#TRPBF trades thermal performance for legacy SSOP compatibility and simpler PCB layout; compared with LTC3833IGN#TRPBF, it sacrifices PGOOD and CLKOUT functionality to retain TRACK/SS and reduce pin count - making it optimal for cost-sensitive, space-constrained, or soft-start–critical applications.
Availability
LTC3834IGN-1#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and portable medical diagnostics requiring stable component supply, extended temperature operation (–40°C to +85°C), and ultra-low quiescent current.
Supply support for LTC3834IGN-1#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 full support for its high-performance power management portfolio, including robust validation, long-term manufacturing commitment, and comprehensive design resources.
The LTC3834-1 series was designed specifically for high-efficiency, wide-input synchronous buck control in battery-powered and automotive systems where low IQ, precise regulation, and flexible light-load behavior are essential.
FAQ
What is the maximum supported input voltage for the LTC3834IGN-1#TRPBF?
The LTC3834IGN-1#TRPBF supports an absolute maximum input voltage of 36V on the VIN pin, with recommended operating range from 4V to 36V. This enables direct use with 12V and 24V automotive batteries, including load-dump transients up to 36V, without external clamping or pre-regulation stages.
Does the LTC3834IGN-1#TRPBF include built-in output overvoltage protection?
Yes, the LTC3834IGN-1#TRPBF includes hardware-based output overvoltage protection that activates when the VFB pin voltage exceeds 10% above its 0.8V regulation point (i.e., >0.88V). Upon detection, the top MOSFET is immediately turned off and the bottom MOSFET is turned on until the fault clears - protecting downstream circuitry without firmware dependency.
How does the TRACK/SS pin function in the LTC3834IGN-1#TRPBF?
The TRACK/SS pin on the LTC3834IGN-1#TRPBF serves dual roles: as a soft-start input (charged by an internal 1μA current source to ramp VOUT) or as a tracking input (connected via resistor divider to another supply rail). During startup, the LTC3834IGN-1#TRPBF regulates VFB to the smaller of 0.8V or the TRACK/SS voltage - enabling controlled, sequenced power-up.
What light-load operating modes does the LTC3834IGN-1#TRPBF support, and how are they selected?
The LTC3834IGN-1#TRPBF supports three light-load modes: Burst Mode® (30μA IQ), pulse-skipping, and forced continuous conduction - selected via DC bias on the PLLIN/MODE pin. Tie to SGND for Burst Mode®, to INTVCC for forced continuous, or to 0.9V–(INTVCC–0.5V) for pulse-skipping. No external components are required for mode selection.
Is the LTC3834IGN-1#TRPBF pin-compatible with other variants in the LTC3834 family?
No, the LTC3834IGN-1#TRPBF is not pin-compatible with the LTC3834 (which includes PGOOD, CLKOUT, and EXTVCC pins) or the LTC3834EDHC-1#TRPBF (which has a different 16-pin DFN footprint and exposed thermal pad). The LTC3834IGN-1#TRPBF uses a 16-lead SSOP package with unique pin assignments optimized for minimal feature set and compact layout.
LTC3834IGN-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-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):
- 4V ~ 36V
- Frequency - Switching:
- 250kHz ~ 530kHz
- Duty Cycle (Max):
- 99.4%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC3834IGN-1#TRPBF FAQ
1.How can I place an order for LTC3834IGN-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3834IGN-1#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 LTC3834IGN-1#TRPBF reliable?
The price and inventory of LTC3834IGN-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3834IGN-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3834IGN-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3834IGN-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3834IGN-1#TRPBF?
LTC3834IGN-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3834IGN-1#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 LTC3834IGN-1#TRPBF?
For technical support, including LTC3834IGN-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3834IGN-1#TRPBF requirements.
6.How does Aetrix verify that LTC3834IGN-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3834IGN-1#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 LTC3834IGN-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3834IGN-1#TRPBF?
All LTC3834IGN-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3834IGN-1#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 LTC3834IGN-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3834IGN-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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