LINEAR LTC3430 Data Handbook/Specifications Sheet
Summary
The LT3430 is a high-efficiency, monolithic switching regulator designed for robust DC-DC power conversion. It features a wide input range (up to 60V) and delivers reliable 3A peak current at a frequency of 200kHz, making it ideal for applications demanding high performance in industrial, automotive, or portable computing systems. This manual provides comprehensive electrical specifications, detailed architecture diagrams, typical application data, and operational guidelines, ensuring engineers can precisely select and integrate this advanced power solution into their designs.
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Final Electrical Specifications
LT3430
High Voltage, 3A, 200k Hz Step-Down Switching Regulator
August 2002
FEATURES DESCRIPTIO Wide Input Range: 5.5V to 60V The LT®3430 is a 200k Hz monolithic buck switching regu- 3A Peak Switch Current lator that accepts input voltages up to 60V. A high efficiency Small Thermally Enhanced 16-Pin TSSOP Package 3A, 0.1Ω switch is included on the die along with all the nec- Constant 200k Hz Switching Frequency essary oscillator, control and logic circuitry. A current mode
Saturating Switch Design: 0.1Ω architecture provides fast transient response and excellent
Peak Switch Current Maintained Over loop stability. Full Duty Cycle Range
Special design techniques and a new high voltage process
Effective Supply Current: 2.5m A
achieve high efficiency over a wide input range. Efficiency
Shutdown Current: 30µA
is maintained over a wide output current range by using the
1.2V Feedback Reference Voltage
output to bias the circuitry and by utilizing a supply boost
Easily Synchronizable
capacitor to saturate the power switch. Patented circuitry
Cycle-by-Cycle Current Limiting
maintains peak switch current over the full duty cycle range. A shutdown pin reduces supply current to 30µA and a SYNC
APPLICATIO S pin can be externally synchronized from 228k Hz to 700k Hz
with a logic level input.
Industrial and Automotive Power Supplies
EF FI CI EN CY
Portable Computers The LT3430 is available in a thermally enhanced 16-pin Battery Chargers TSSOP package.
Distributed Power Systems , LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
5V, 2A Buck Converter MMSD914TI
0.68µF Efficiency vs Load Current
BOOST
VIN 22µH VOUT
5.5V* VIN SW 5V TO 60V 2A VOUT = 5V
30BQ060
4.7µF 100V LT3430
VIN = 12V
CERAMIC†
100µF 10V SOLID
ONOFF SHDN BIAS
TANTALUM
SYNC FB VIN = 42V
VCGND 4.99k
0.5 1.0 1.5 2.0 2.5 LOAD CURRENT (A)
FOR INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS MAY APPLY 3430 TA02 UNITED CHEMI-CON 3430 TA01
sn3430 3430is
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Page Summary Contents For LINEAR LTC3430 Data Handbook/Specifications Sheet
Manual Details
| Brand | Linear |
|---|---|
| Pages | 28 |
| File Size | 298.99 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What is the operating temperature range for the LT3430EFE and LT3430IFE packages?
Both versions have an operating junction temperature range of -40°C to 125°C.
How can I externally synchronize the device?
The SYNC pin allows external synchronization from 228kHz to 700kHz using a logic level input.
What is the minimum input voltage supported by this regulator?
It supports a wide nWide Input Range of 5.5V up to 60V.
What happens if I use an exposed pad package and need better thermal performance?
The document recommends consulting LTC Marketing for parts specified with wider operating temperature ranges for these packages.