LT1932 Linear Technology, LT1932 Datasheet - Page 16

• Manufacturer Part Number: LT1932
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: Linear Technology

RELATED PARTS
PART NUMBER
LT1615
LT1617
LT1618
LTC1682
LT1930
LT1931
LTC3200
LT1932
TYPICAL APPLICATIO
2.7V TO 4.2V
16
2.7V TO 4.2V
V
V
IN
IN
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN TMK316BJ105
D1: ZETEX ZHCS400
L1: MURATA LQH3C4R7M24
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN TMK325BJ475
D1: ZETEX ZHCS400
L1: MURATA LQH3C100M24
DIMMING
CONTROL
Li-Ion Driver for Ten White LEDs
DESCRIPTION
Micropower DC/DC Converter in 5-Lead ThinSOT
Micropower Inverting DC/DC Converter in 5-Lead ThinSOT
Constant-Current/Constant-Voltage DC/DC Converter
Doubler Charge Pump with Low Noise Linear Regulator
1.4MHz Switching Regulator in 5-Lead ThinSOT
Inverting 1.2MHz Switching Regulator in 5-Lead ThinSOT
Low Noise Regulated Charge Pump
Li-Ion Driver for Six White LEDs
C1
4.7 F
C1
4.7 F
3.3V DC
80.6k
5
5
SHDN
SHDN
R
R
V
V
SET
SET
IN
IN
6
4
6
4
R
1.50k
R
750
LT1932
LT1932
4.7 H
SET
10 H
SET
L1
L1
GND
GND
SW
SW
U
LED
LED
1
2
1
2
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
D1
3
D1
3
www.linear.com
15mA
30mA
100
100
1932 TA12a
C2
1 F
1932 TA16a
C2
4.7 F
COMMENTS
20V at 12mA from 2.5V Input, ThinSOT Package
–15V at 12mA from 2.5V Input, ThinSOT Package
Drives 20 White LEDs from Li-Ion, MS10 Package
3.3V and 5V Outputs with 60 V
5V at 480mA from 3.3V Input, ThinSOT Package
– 5V at 350mA from 5V Input, ThinSOT Package
5V Output with Up to 100mA Output
85
80
75
70
65
60
55
80
75
70
65
60
55
50
0
0
5
TOTAL LED CURRENT (mA)
5
LED CURRENT (mA)
10
Efficiency
Efficiency
15
10
V
IN
LINEAR TECHNOLOGY CORPORATION 2001
V
= 2.7V
RMS
IN
1932i LT/TP 0701 1.5K • PRINTED IN USA
20
V
V
= 4.2V
IN
IN
Noise, Up to 80mA Output
= 4.2V
= 2.7V
15
25
1932 TA12b
1932 TA16b
20
30