LTC3531 Datasheet, PDF (16/16 Pages) Linear Technology – 200mA Buck-Boost Synchronous DC/DC Converters

LTC3531/
LTC3531-3.3/LTC3531-3
TYPICAL APPLICATIO
Complete USB/Li-Ion Powered System
with 3.3V_OUT and Linear Charger
5V (NOM)
FROM USB
CABLE
SUSPEND
USB POWER
+
– ^Li-Ion
LTC4055
IN1
OUT
IN2
CHRG
HPWR ACPR
SUSP VNTC
BAT
TIMER
CLPROG
GND
PROG
SHDN WALL NTC
V_OUT: USB OR BATTERY
OTHER
DC/DC
L1
10μH
100k
100k
SW1
3.1V TO 5.25V
V_IN
SW2
V_OUT
LTC3531-3.3
0.1μF
C1
22μF
SHDN
GND
C1, C2: TAIYO YUDEN JMK316BJ106ML
L1: MURATA LQH43CN100K03 (650mA 0.24Ω)
V_OUT
3.3V
160mA
C2
10μF
3531 TA05
RELATED PARTS
PART NUMBER
LT1930/LT1930A
DESCRIPTION
1A (I_SW), 1.2MHz/2.2MHz, High Efficiency Step-Up DC/DC Converter
LTC3400/LTC3400B
600mA (I_SW), 1.2MHz Synchronous Step-Up DC/DC Converter
LTC3401/LTC3402
1A/2A (I_SW), 3MHz Synchronous Step-Up DC/DC Converter
LTC3405/LTC3405A
300mA (I_OUT), 1.5MHz Synchronous Step-Down DC/DC Converter
LTC3406/LTC3406B
600mA (I_OUT), 1.5MHz Synchronous Step-Down DC/DC Converter
LTC3421
3A (I_SW), 3MHz Synchronous Step-Up DC/DC Converter
LTC3422
1.5A (I_SW), 3MHz Synchronous Step-Up DC/DC Converter
LTC3426
LTC3428
LTC3429
2A (I_SW), 1.2MHz Step-Up DC/DC Converter in SOT-23
4A (I_SW), 1.2MHz Step-Up DC/DC Converter
600mA (I_SW), 500kHz Synchronous Step-Up DC/DC Converter
LTC3440
600mA (I_OUT), 2MHz Synchronous Buck-Boost DC/DC Converter
LTC3441
600mA (I_OUT), 2MHz Synchronous Buck-Boost DC/DC Converter
LTC3442
LTC3443
2MHz Synchronous Buck-Boost with Auto-Burst
1.2A (I_OUT), 600kHz Synchronous Buck-Boost DC/DC Converter
LTC3458
LTC3458L
LTC3459
LTC3525/LTC3525-3.3/
LTC3525-5
1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter
1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter
10V Micropower Synchronous Step-Up DC/DC Converter
400mA (I_SW), Synchronous Step-Up DC/DC Converter
with Output Disconnect
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
V_IN: 2.6V to 16V, V_OUT(MAX) = 34V,
I_Q = 4.2mA/5.5mA, I_SD < 1μA, ThinSOT Package
V_IN: 0.85V to 5V, V_OUT(MAX) = 5V,
I_Q = 19μA/300μA, I_SD < 1μA, ThinSOT Package
V_IN: 0.5V to 5V, V_OUT(MAX) = 6V, I_Q = 38μA,
I_SD < 1μA, MS Package
V_IN: 2.7V to 6V, V_OUT(MIN) = 0.8V, I_Q = 20μA,
I_SD ≤ 1μA, MS10 Package
V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 20μA,
I_SD ≤ 1μA, ThinSOT Package
V_IN: 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 12μA,
I_SD < 1μA, QFN Package
V_IN: 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 25μA,
I_SD < 1μA, 3mm × 3mm DFN Package
V_IN: 1.6V to 5V, V_OUT up to 5.5V
V_IN: 1.6V to 5V, V_OUT up to 5.5V
V_IN: 0.5V to 4.4V, V_OUT(MIN) = 5V, I_Q = 20μA,
I_SD < 1μA, QFN Package
V_IN: 2.5V to 5.5V, V_OUT(MIN) = 5.5V, I_Q = 25μA,
I_SD < 1μA, MS, DFN Packages
V_IN: 2.5V to 5.5V, V_OUT(MIN) = 5.5V, I_Q = 25μA,
I_SD < 1μA, DFN Package
V_IN: 2.4V to 5.5V, V_OUT up to 5.25V
V_IN: 2.4V to 5.5V, V_OUT(MIN) = 5.25V, I_Q = 28μA,
I_SD < 1μA, MS Package
V_IN: 1.5V to 6V, V_OUT up to 7.5V
V_IN: 1.5V to 6V, V_OUT up to 6V
V_IN: 1.5V to 5.5V, V_OUT up to 10V
V_IN: 0.5V to 4.5V, I_Q = 7μA, I_SD < 1μA,
2mm × 2mm SC70 Package
3531fb
LT 0807 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2006