LINEAR TECHNOLOGY LT1934 LT1934-1 User's Manual
Summary
Optimize your power management solutions with this micropower step-down DC/DC converter. Ideal for engineers designing battery-powered or complex electronic systems, the LT1934 provides efficient voltage regulation across a wide input range (3.2V to 34V). The manual offers comprehensive coverage, detailing low quiescent current performance, high efficiency in various modes, and numerous applications ranging from automotive batteries to industrial controls. Learn about package options, precise technical specifications, and optimal circuit integration for reliable power delivery.
Page 1 Text Content
LT1934/LT1934-1
Micropower Step-Down Switching Regulators in Thin SOT and DFN
FEATURES DESCRIPTION n Wide Input Voltage Range: 3.2V to 34V
The LT®1934 is a micropower step-down DC/DC converter
n Micropower Operation: IQ = 12μA
with internal 400m A power switch, packaged in a low
n 5V at 250m A from 6.5V to 34V Input (LT1934) profi le (1mm) Thin SOT. With its wide input range of 3.2V n 5V at 60m A from 6.5V to 34V Input (LT1934-1) to 34V, the LT1934 can regulate a wide variety of power n 3.3V at 250m A from 4.5V to 34V Input (LT1934) sources, from 4-cell alkaline batteries and 5V logic rails n 3.3V at 60m A from 4.5V to 34V Input (LT1934-1) to unregulated wall transformers and lead-acid batteries. n Low Shutdown Current: <1μA Quiescent current is just 12μA and a zero current shut- n Low VCESAT Switch: 200m V at 300m A down mode disconnects the load from the input source, n Low Profi le (1mm) SOT-23 (Thin SOTTM) and simplifying power management in battery-powered sys-
(2mm × 3mm × 0.8mm) 6-Pin DFN Package tems. Burst Mode® operation and the low drop internal power switch result in high effi ciency over a broad range of load current.
APPLICATIONS
The LT1934 provides up to 300m A of output current. The
FF IC IE
n Wall Transformer Regulation LT1934-1 has a lower current limit, allowing optimum n Automotive Battery Regulation choice of external components when the required output n Standby Power for Portable Products current is less than 60m A. Fast current limiting protects n Distributed Supply Regulation the LT1934 and external components against shorted n Industrial Control Supplies outputs, even at 34V input.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
3.3V Step-Down Converter Effi ciency
LT1934 VIN = 12V
BOOST
47μH VOUT = 5V
VIN SW 3.3V
4.5V TO 34V
D1 VOUT = 3.3V
2.2μF LT1934
ON OFF SHDN FB
100μF GND 604k
C1: SANYO 4TPB100M
1934 TA01
C2: TAIYO YUDEN GMK325BJ225MN 0.1
D1: ON SEMICONDUCTOR MBR0540 LOAD CURRENT (m A) D2: CENTRAL CMDSH-3 1934 TA02 L1: SUMIDA CDRH4D28-470
1934fd
Page Summary Contents For LINEAR TECHNOLOGY LT1934 LT1934-1 User's Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 20 |
| File Size | 282.95 KB |
| Published | May 31, 2026 |
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