LT1610_15 Datasheet, PDF (16/16 Pages) Linear Technology – 1.7MHz, Single Cell Micropower DC/DC Converter

LT1610
TYPICAL APPLICATIONS N
INPUT
Li-ION
3V to 4.2V
+
Li-Ion to 3.3V SEPIC DC/DC Converter
C3
L1
22µH _•
1µF
CERAMIC
D1
C1
22µF
6.3V
6
5
V_IN
SW
1
V_C
2
FB
LT1610
8
COMP
3
SHDN
GND
PGND
7
4
1M ^•
L2
22µH
604k
+
V_OUT
3.3V
120mA
C2
22µF
6.3V
C1, C2: AVX TAJB226M006
C3: AVX 1206YC105 (X7R)
D1: MOTOROLA MBR0520
SHUTDOWN
L1, L2: MURATA LQH3C220 (UNCOUPLED)
OR SUMIDA CLS62-220 (COUPLED)
1610 TA14
4 CELLS
4-Cell to 5V/120mA SEPIC DC/DC Converter
L1
22µH _•
C3
1µF
CERAMIC
D1
V_OUT
5V
120mA
6
5
V_IN
SW
+ C1
1
V_C
2
FB
22µF
6.3V
LT1610
8
COMP
SHDN ³
1M ^•
L2
22µH
324k
+ C2
22µF
6.3V
GND
PGND
7
4
C1, C2: AVX TAJB226M006
C3: AVX 1206YC105 (X7R)
D1: MOTOROLA MBR0520
SHUTDOWN
L1, L2: MURATA LQH3C220 (UNCOUPLED)
OR SUMIDA CLS62-220 (COUPLED)
1610 TA16
Efficiency
80
V_IN = 2.7V
V_IN = 3.6V
70
V_IN = 4.2V
60
50
40
30
0.1
1
10
LOAD CURRENT (mA)
100
1610 TA15
4-Cell to 5V Efficiency
80
V_IN = 3.6V
V_IN = 4.2V
70
V_IN = 5V
V_IN = 6.5V
60
50
40
30
0.1
1
10
LOAD CURRENT (mA)
100
1610 TA17
RELATED PARTS
PART NUMBER
LTC^®1474
LT1307
LTC1440/1/2
LTC1502-3.3
LT1521
LT1611
LT1613
LTC1682
DESCRIPTION
Micropower Step-Down DC/DC Converter
Single Cell Micropower 600kHz PWM DC/DC Converter
Ultralow Power Single/Dual Comparators with Reference
Single Cell to 3.3V Regulated Charge Pump
Micropower Low Dropout Linear Regulator
Inverting 1.4MHz DC/DC Converter
Step-Up 1.4MHz DC/DC Converter
Doubler Charge Pump with Low Noise Linear Regulator
16
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX:[phone] ^q www.linear-tech.com
COMMENTS
94% Efficiency, 10µA I_Q, 9V to 5V at 250mA
3.3V at 75mA from 1 Cell, MSOP Package
2.8µA I_Q, Adjustable Hysteresis
40µA I_Q, No Inductors, 3.3V at 10mA from 1V Input
500mV Dropout, 300mA Current, 12µA I_Q
5V to – 5V at 150mA, Tiny SOT-23 Package
3.3V to 5V at 200mA, Tiny SOT-23 Package
Fixed 3.3V and 5V Outputs, 1.8V to 4.4V Input Range, 50mA Output
1610f LT/TP 0699 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1998