LT1947 LINER [Linear Technology], LT1947 Datasheet - Page 8

• Manufacturer Part Number: LT1947
• Description: Adjustable Output TFT-LCD Triple Switching Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIO
LT1947
RELATED PARTS
PART NUMBER
LT1310
LT1613
LT1615/LT1615-1
LT1940
LT1944
LT1944-1
LT1945
LT1946/LT1946A
LT1949/LT1949-1
LTC3400/LTC3400B 600mA I
LTC3401
LTC3402
LTC3423
LTC3424
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
D3
BAT54S
DESCRIPTION
1.5A I
Step-Up DC/DC Converter
550mA I
Step-Up DC/DC Converter
300mA/80mA I
High Efficiency Step-Up DC/DC Converter
Dual Output 1.4A I
High Efficiency Step-Down DC/DC Converter
Dual Output 350mA I
High Efficiency Step-Up DC/DC Converter
Dual Output 150mA I
High Efficiency Step-Up DC/DC Converter
Dual Output, Pos/Neg 350mA I
High Efficiency Step-Up DC/DC Converter
1.5A I
Step-Up DC/DC Converter
550mA I
Step-Up DC/DC Converter
Step-Up DC/DC Converter
1A I
2A I
1A I
DC/DC Converter
2A I
DC/DC Converter
C6
0.68 F
SW
SW
SW
SW
D4
SW
SW
, 3MHz, Synchronous Step-Up DC/DC Converter V
, 3MHz, Synchronous Step-Up DC/DC Converter V
, 3MHz, Low V
, 3MHz, Low V
SW
SW
SW
, 4.5MHz, High Efficiency
, 1.2MHz/2.7MHz, High Efficiency
, 1.4MHz, High Efficiency
, 600kHz/1.1MHz, High Efficiency
, 1.2MHz, Synchronous
C4
0.68 F
SW
, Constant Off-Time,
OUT
SW
SW
OUT
OUT
D5
, Constant 1.1MHz,
U
, Constant Off-Time,
, Constant Off-Time,
BAT54S
, Synchronous Step-Up
, Synchronous Step-Up
TFT-LCD Bias Generator: 7.5V, 15V, – 10V Output
C7
0.68 F
www.linear.com
SW
D6
, Constant Off-Time,
C8
34k
D7
Q1
34k
V
–10V
20mA
OFF
COMMENTS
V
V
V
V
V
V
V
V
V
V
V
V
SHUTDOWN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
= 2.75V to 18V, V
= 0.9V to 10V, V
= 1.2V to 15V, V
= 3V to 25V, V
= 1.2V to 15V, V
= 1.2V to 15V, V
= 1.2V to 15V, V
= 2.45V to 16V, V
= 1.5V to 12V, V
= 0.85V to 5V, V
= 0.5V to 5V, V
= 0.5V to 5V, V
= 0.5V to 5V, V
= 0.5V to 5V, V
CERAMIC
3.3V
C1: TAIYO YUDEN JMK107BJ105MA
C2: TAIYO YUDEN LMK325BJ335MD
C3, C7, C8: TAIYO YUDEN EMK212BJ684MD
C4, C6: TAIYO YUDEN LMK107BJ684MA
V
IN
1 F
C1
1 F 6.3V X7R 2
3.3 F 10V X7R 2
2
0.68 F 10V X5R
0.68 F 16V X7R
OUT
OUT
OUT
OUT
OUT
L2
4.7 H
OUT
OUT
OUT
OUT
OUT
OUT
OUT
D2
C3
0.68 F
OUT
OUT
Min = 1.2V, I
Max = 6V, I
Max = 6V, I
Max = 6V, I
Max = 6V, I
Max = 34V, I
Max = 34V, I
Max = 34V, I
Max = 34V, I
Max = 34V, I
Max = 28V, I
Max = 5V, I
Max = 35V, I
Max = 34V, I
R3
105k
R4
10k
SW2
V
FB2
O2
SHDN C
10nF
Q
Q
Q
Q
V
Q
IN
C5
Q
= 38 A, I
= 38 A, I
= 38 A, I
= 38 A, I
Q
Q
Q
Q
Q
LT1947
D1: MBRM120
D2: CMDSH-3
D7: MMBZ5240 10V ZENER
L1: SUMIDA CLQ4D103R3
L2: TAIYO YUDEN LB2012B-4R7M
Q1: MMBT3906 PNP
= 2.5mA, I
= 19 A/300 A, I
3.3 H
Q
Q
Q
L1
= 3mA, I
= 20 A, I
= 20 A, I
= 20 A, I
= 4.5mA, I
T
= 12mA, I
= 3.2mA, I
LINEAR TECHNOLOGY CORPORATION 2001
= 20 A, I
SW1
GND
V
FB1
ON
SHDN
SHDN
SHDN
SHDN
SHDN
SHDN
SHDN
SHDN
SHDN
D1
LT/TP 0802 2K • PRINTED IN USA
SHDN
SHDN
SHDN
SHDN
= <1 A, MS10
= <1 A, MS10
= <1 A, MS10
= <1 A, MS10
= <1 A, ThinSOT
= <1 A, TSSOP-16E
R1
49.9k
R2
10k
= <1 A, MS10
= <1 A, MS10
= <1 A, ThinSOT
SHDN
= <25 A, MS8, S8
= <1 A, MS10
= <1 A, MS10E
= <1 A, MS8
= <1 A, ThinSOT
1947 TA03
C2
3.3 F
CERAMIC
2
AV
7.5V
200mA
V
15V
10mA
ON
DD
1947f