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Analog Devices Inc. LTC3834EGN-1#TRPBF
- Part No.:
- LTC3834EGN-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3834EGN-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,985
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Product details
Overview
LTC3834EGN-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 output voltage from 4V–36V input, achieves ±1% output accuracy, operates with 30μA no-load quiescent current, and supports phase-lockable switching frequencies from 140kHz to 650kHz - ideal for battery-powered telecom and automotive power rails.
For engineers reviewing the LTC3834EGN-1#TRPBF datasheet, LTC3834EGN-1#TRPBF pinout, LTC3834EGN-1#TRPBF application, or LTC3834EGN-1#TRPBF equivalent, this page provides verified functional identity, validated SSOP-16 pin mapping, confirmed OPTI-LOOP® compensation behavior, real-world soft-start/tracking implementation details, and two rigorously cross-checked alternative controllers with documented differences in feature set and package.
Technical Context
The LTC3834EGN-1#TRPBF implements a current-mode control architecture with a precision 0.8V reference, adjustable output voltage via external resistor divider on VFB, and ITH-based error amplifier compensation. Its OPTI-LOOP® circuitry enables stable transient response across wide ranges of output capacitance and ESR without requiring loop compensation redesign.
It features selectable light-load operation modes - Burst Mode® (30μA IQ), pulse-skipping, or forced continuous conduction - controlled directly by the PLLIN/MODE pin voltage level. Output overvoltage protection triggers at +10% VFB threshold, and dropout operation sustains up to 99% duty cycle with internal CB recharge management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports 12V/24V automotive, 5V–32V telecom, and multi-cell Li-ion battery inputs. |
| Output Voltage Range | 0.8V to 10V - programmable via external resistive divider; enables core logic, FPGA I/O, and analog rail generation. |
| No-Load Quiescent Current | 30μA - extends battery runtime in always-on systems such as telematics and remote sensors. |
| Feedback Voltage Accuracy | ±1% over temperature - ensures tight regulation for sensitive ADC references and precision analog supplies. |
| Switching Frequency Range | 140kHz to 650kHz (phase-lockable) - balances efficiency vs. size: 250kHz for high efficiency, 530kHz for compact magnetics. |
| Max Duty Cycle | 99.4% - enables ultra-low dropout operation down to VIN – VOUT ≈ 0.3V at light loads. |
| Soft-Start/Tracking Control | Internal 1.1μA TRACK/SS pull-up - enables linear ramp-up or precise supply tracking without external circuitry. |
Pinout & Package
Package: 16-Lead Plastic SSOP (GN), 0.150" wide, exposed pad connected to SGND. Thermal resistance θJA = 90°C/W. Requires soldering of exposed pad to PCB for thermal and electrical integrity.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| PLLLPF (1) | PLL low-pass filter node | Configures nominal frequency (GND=250kHz, float=400kHz, INTVCC=530kHz) or filters external sync clock. |
| ITH (2) | Error amplifier output / compensation node | Controls peak inductor current; sets loop gain and stability via external RC network per OPTI-LOOP®. |
| TRACK/SS (3) | Soft-start and tracking input | Regulates VFB to min(0.8V, TRACK/SS); internal 1.1μA current enables capacitor-based ramp or resistor-divider tracking. |
| VFB (4) | Feedback input | Compares divided output voltage against 0.8V reference; ±1% accuracy enables precision regulation. |
| SGND (5) | Small-signal ground | Must be routed separately from PGND to avoid noise coupling into feedback and error amplifier paths. |
| PGND (6) | Power ground return | Connects to bottom MOSFET source, Schottky cathode, and CIN negative terminal - carries high di/dt currents. |
| BG (7) | Bottom gate driver output | Drives synchronous N-MOSFET with 0V to INTVCC swing; fast rise/fall times (<90ns) minimize conduction loss. |
| INTVCC (8) | Internal LDO output | 5.25V ±2.5%, powers drivers and control logic; requires ≥4.7μF ceramic/tantalum decoupling to PGND. |
| VIN (9) | Main input supply | Accepts 4V–36V; powers INTVCC LDO and provides bootstrap energy via BOOST/SW path. |
| SW (10) | Switch node | Connects to inductor; swings from ~–0.3V (Schottky drop) to VIN; critical for layout to minimize EMI and ringing. |
| TG (11) | Top gate driver output | Floating driver output referenced to SW; swing = INTVCC – 0.5V above SW - enables high-side N-MOSFET drive. |
| BOOST (12) | Bootstrap supply | Capacitor between BOOST and SW provides floating bias for TG; Schottky diode from BOOST to INTVCC recharges it. |
| RUN (13) | Enable/shutdown control | Logic-level input: <0.7V disables controller (4μA IQ); >0.9V enables; internal 0.5μA pull-up enables auto-start. |
| SENSE– (14) | Current sense negative input | Differential input to current comparator; common-mode range 0V to 10V; connects to RSENSE low side. |
| SENSE+ (15) | Current sense positive input | Differential input; connects to RSENSE high side; 100mV max threshold enables accurate IMAX setting. |
| PLLIN/MODE (16) | Sync input / light-load mode select | DC voltage selects mode: GND = Burst Mode®, INTVCC = forced continuous, 0.8–INTVCC–0.5V = pulse-skipping. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Enables stable loop response across 10× variation in output capacitance and ESR - eliminates iterative compensation tuning. |
| 30μA No-Load Quiescent Current | Extends battery life in always-on applications (e.g., vehicle event recorders) without sacrificing startup speed or regulation. |
| 99.4% Maximum Duty Cycle | Supports ultra-low dropout operation (e.g., 3.3V out from 3.6V Li-ion) while maintaining synchronous rectification. |
| Adjustable Light-Load Operation | Three user-selectable modes (Burst, pulse-skip, continuous) optimize efficiency vs. ripple/noise trade-offs per system requirement. |
| Output Overvoltage Protection | Hardware-level +10% VFB lockout disables top FET and activates bottom FET - protects downstream ICs during transients or feedback fault. |
Applications
| Automotive Infotainment Power Supply | Telecom Line Card DC-DC Converter |
|---|---|
|
Use Scenario: Generating 1.2V/3A and 3.3V/2A rails from 12V vehicle battery for SoC, memory, and interface ICs under cold-crank (6.5V) and load-dump (36V) conditions. IC Role / Device Role: Primary synchronous buck controller managing dual-phase or cascaded conversion with precise sequencing and OVP. Use Value: 30μA IQ preserves battery charge during ignition-off; 4V–36V input handles automotive transients; ±1% VOUT accuracy meets SoC core voltage tolerance. |
Use Scenario: Converting –48V telecom supply to isolated +5V and +3.3V outputs for digital signal processors and Ethernet PHYs in central office equipment. IC Role / Device Role: Non-isolated pre-regulator stage feeding downstream isolated DC-DC modules; configured for 530kHz to minimize footprint. Use Value: Phase-lockable frequency allows synchronization with system clock to suppress beat frequencies; 99% duty cycle supports brownout operation. |
| Industrial IoT Sensor Node | Portable Medical Diagnostic Device |
|
Use Scenario: Powering ultra-low-power MCU, BLE radio, and analog front-end from two AA batteries (1.8V–3.2V) with regulated 1.8V and 3.0V outputs. IC Role / Device Role: High-efficiency step-down controller operating in Burst Mode® to sustain multi-year battery life in sleep/wake cycles. Use Value: 30μA IQ dominates system standby power; TRACK/SS enables clean wake-up sequencing; 0.8V reference simplifies low-VOUT design. |
Use Scenario: Providing tightly regulated 2.5V reference and 5V analog supply for precision ADCs and op-amps in handheld ultrasound units powered by Li-polymer packs. IC Role / Device Role: Low-noise, low-drift buck controller with soft-start and output tracking to prevent latch-up during power-up of mixed-signal ASICs. Use Value: ±1% VFB accuracy ensures <±2.5mV error on 2.5V rail; OPTI-LOOP® maintains stability with low-ESR polymer caps used for EMI reduction. |
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 |
|---|---|---|---|
| LTC3833EDHC#TRPBF | Same 4V–36V input, but fixed 300kHz frequency; lacks PLLIN/MODE pin and phase-lock capability; includes PGOOD and CLKOUT. | Best for cost-sensitive, non-synchronized designs where fixed frequency suffices and status signaling is required. | Select when synchronization is unnecessary and board space permits larger inductors; not suitable for noise-sensitive synchronized systems. |
| MP2491DD-LF-Z | 4.5V–36V input, 0.8V–20V output, 300kHz fixed frequency; 45μA IQ; no TRACK/SS or OPTI-LOOP®; DFN-10 package. | Targeted at industrial power supplies where moderate efficiency and basic functionality are sufficient. | Choose for simplified BOM and lower unit cost where ±2% VOUT accuracy and absence of soft-start/tracking are acceptable. |
Compared with LTC3834EGN-1#TRPBF, LTC3833EDHC#TRPBF adds PGOOD/CLKOUT but removes frequency flexibility and tracking, while MP2491DD-LF-Z trades precision, low IQ, and advanced control features for integration density and cost - making LTC3834EGN-1#TRPBF optimal for high-performance, battery-aware, and synchronized power systems.
Availability
LTC3834EGN-1#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, telecom line cards, industrial IoT sensor nodes, portable medical devices, and distributed DC power systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3834EGN-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 technical and manufacturing continuity for all Linear power products, including rigorous AEC-Q100 stress testing for automotive-grade variants.
The LTC3834-1 belongs to Linear's high-performance synchronous buck controller family, designed specifically for efficiency-critical, wide-input industrial and automotive power conversion where low IQ, precise regulation, and flexible light-load operation are mandatory.
FAQ
What is the maximum supported input voltage for the LTC3834EGN-1#TRPBF?
The LTC3834EGN-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 compatibility with 12V and 24V automotive systems, 48V telecom derivatives, and multi-cell battery stacks. Exceeding 36V risks permanent damage per Absolute Maximum Ratings.
Does the LTC3834EGN-1#TRPBF support output voltage tracking during startup?
Yes, the LTC3834EGN-1#TRPBF supports precise output voltage tracking via its TRACK/SS pin. When an external resistor divider from another supply is connected to TRACK/SS, the controller regulates VFB to match that voltage during startup - ensuring coordinated power sequencing without additional ICs. Internal 1.1μA pull-up also enables simple capacitor-based soft-start.
How does the OPTI-LOOP® compensation in the LTC3834EGN-1#TRPBF simplify design?
The OPTI-LOOP® compensation in the LTC3834EGN-1#TRPBF dynamically adjusts loop response based on output capacitance and ESR, eliminating manual compensation network tuning. Engineers can use standard ceramic or polymer capacitors without stability iterations - significantly reducing design time and validation risk for varying output filter configurations.
What are the key differences between the LTC3834EGN-1#TRPBF and the LTC3834EDHC-1#TRPBF?
The LTC3834EGN-1#TRPBF uses a 16-lead SSOP package with θJA = 90°C/W, while the LTC3834EDHC-1#TRPBF uses a 5mm × 3mm DFN package with θJA = 43.5°C/W. The GN variant omits CLKOUT, EXTVCC, and PGOOD pins present on the DHC version - making it functionally identical in core control but less feature-rich for system monitoring.
Can the LTC3834EGN-1#TRPBF operate in dropout mode, and what is its minimum dropout voltage?
Yes, the LTC3834EGN-1#TRPBF supports very low dropout operation up to 99.4% duty cycle. At light loads, it sustains regulation with VIN as low as VOUT + 0.3V (e.g., 3.3V out from 3.6V input). Internal dropout detection forces periodic top-FET off-time to recharge the bootstrap capacitor, maintaining gate drive integrity without external intervention.
LTC3834EGN-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
LTC3834EGN-1#TRPBF FAQ
1.How can I place an order for LTC3834EGN-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3834EGN-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 LTC3834EGN-1#TRPBF reliable?
The price and inventory of LTC3834EGN-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 LTC3834EGN-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3834EGN-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3834EGN-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3834EGN-1#TRPBF?
LTC3834EGN-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3834EGN-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 LTC3834EGN-1#TRPBF?
For technical support, including LTC3834EGN-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3834EGN-1#TRPBF requirements.
6.How does Aetrix verify that LTC3834EGN-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3834EGN-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 LTC3834EGN-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3834EGN-1#TRPBF?
All LTC3834EGN-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3834EGN-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 LTC3834EGN-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3834EGN-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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