LTC3025-1/LTC3025-2/
LTC3025-3/LTC3025-4
14
30251234ff
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2007
LT 0411 REV F • PRINTED IN USA
relaTeD parTs
PART NUMBER DESCRIPTION COMMENTS
LT1761 100mA, Low Noise Micropower, LDO V
IN
: 1.8V to 20V, V
OUT(MIN)
= 1.22V, V
DO
= 0.30V, I
Q
= 20µA, I
SD
< 1µA,
V
OUT
= Adj, 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V, 5V, ThinSOT
TM
Package.
Low Noise < 20µV
RMSP-P
, Stable with 1µF Ceramic Capacitors
LT1762 150mA, Low Noise Micropower LDO V
IN
: 1.8V to 20V, V
OUT(MIN)
= 1.22V, V
DO
= 0.30V, I
Q
= 25µA, I
SD
< 1µA,
V
OUT
= Adj, 2.5V, 3V, 3.3V, 5V, MS8 Package. Low Noise < 20µV
RMSP-P
LTC1844 150mA, Very Low Dropout LDO V
IN
: 1.6V to 6.5V, V
OUT(MIN)
= 1.25V, V
DO
= 0.08V, I
Q
= 40µA, I
SD
< 1µA,
V
OUT
= Adj, 1.5V, 1.8V, 2.5V, 2.8V, 3.3V, ThinSOT Package.
Low Noise < 30µV
RMSP-P
, Stable with 1µF Ceramic Capacitors
LT1962 300mA, Low Noise Micropower LDO V
IN
: 1.8V to 20V, V
OUT(MIN)
= 1.22V, V
DO
= 0.27V, I
Q
= 30µA, I
SD
< 1µA,
V
OUT
= 1.5, 1.8V, 2.5V, 3V, 3.3V, 5V, MS8 Package. Low Noise < 20µV
RMSP-P
LT1964 200mA, Low Noise Micropower, Negative LDO V
IN
: –0.9V to –20V, V
OUT(MIN)
= –1.21V, V
DO
= 0.34V, I
Q
= 30µA, I
SD
< 3µA,
V
OUT
= Adj, –5V, ThinSOT Package.
Low Noise < 30µV
RMSP-P
, Stable with Ceramic Capacitors
LT3020 100mA, Low Voltage, VLDO V
IN
: 0.9V to 10V, V
OUT(MIN)
= 0.20V, V
DO
= 0.15V, I
Q
= 120µA, I
SD
< 3µA,
V
OUT
= Adj, DFN, MS8 Package
LTC3025 300mA Micropower VLDO Linear Regulator 45mV Dropout Voltage, Low Noise: 80µV
RMS
, V
IN
: 0.9V to 5.5V, Low I
Q
= 54µA,
2mm × 2mm 6-Lead DFN Package
LTC3026 1.5A, Low Input Voltage VLDO Regulator V
IN
: 1.14V to 3.5V (Boost Enabled), 1.14V to 5.5V (with External 5V Rail),
V
DO
= 0.1V, I
Q
= 950µA, Stable with 10µF Ceramic Capacitors,
DFN-10 and MSOP-10 Packages
Typical applicaTion
High Efficiency 1.5V Step-Down Converter with Efficient 1.2V VLDO Output
Efficiency vs Output Current
LTC3025-1
BIAS
0.1µF
1µF
IN
SHDN
OUT
80.6k
V
OUT
= 1.2V
I
OUT
≤ 500mA
40.2k
30251234 TA02
ADJ
GND
1
3
6
4
5
2
OFF ON
V
IN
C
IN
**
4.7µF
CER
V
IN
2.7V
TO 5.5V
LTC3406-1.5
RUN
2.2µH*
*
**
†
MURATA LQH32CN2R2M33
TAIYO YUDEN JMK212BJ475MG
TAIYO YUDEN JMK316BJ106ML
SW
4
1
3
5
C
OUT
†
10µF
CER
V
OUT
1.5V
600mA
V
OUT
GND
OUTPUT CURRENT (mA)
EFFICIENCY (%)
100
90
80
70
60
50
40
0.1 10 100 1000
30251234 TA03
1
LTC3406-1.5
V
OUT
= 1.5V
LTC3025-1
V
OUT
= 1.2V
V
IN
= 3.6V
