lt3570 Linear Technology Corporation, lt3570 Datasheet - Page 20

• Manufacturer Part Number: lt3570
• Description: 1.5a Buck Converter, 1.5a Boost Converter And Ldo Controller
• Manufacturer: Linear Technology Corporation

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TYPICAL APPLICATION
20
PART NUMBER
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ThinSOT is a trademark of Linear Technology Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
DESCRIPTION
1.5A, 1.25MHz Step-Down Switching Regulator
1A (I
Converter
25V, 2.4MHz Step-Down DC/DC Converter and LDO Controller
Quad Output, 2.6A Buck, 2.6A Boost, 0.3A Boost, 0.4A Inverter
1.2MHz TFT DC/DC Converter
Dual Output Pos/Neg 350mA (I
High Effi ciency Step-Up DC/DC Converter
Dual Output Pos/Neg 250mA (I
Effi ciency Step-Up DC/DC Converter with Integrated Schottkys
1.1A, 1.3MHz Step Up DC/DC Converter with Integrated Soft-Start
40V, 2A, 2.4MHz Step-Down DC/DC Converter and LDO Controller
36V, 2.5MHz Triple (2.4A, 1.5A, 1.5A) Step-Down DC/DC Converter
and LDO Controller
4V TO 12V
200mA
●
V
SW
OUT1
FAX: [phone]
V
15V
IN
), 1.2MHz/2.2MHz, High Effi ciency Step-Up DC/DC
C9
10μF
C1
10μF
10nF
R1
191k
R2
10.7k
C4
●
SHDN1
SHDN2
SHDN3
D1
www.linear.com
SW
SW
12μH
), Constant Off-Time,
), Constant Off-Time, High
L1
R7
25k
C6
1nF
SS1
V
SHDN1
SHDN2
SHDN3
SW1
FB1
V
R
C1
IN1
T
R9
20k
PDA Core
V
IN2
LT3570
SYNC
V
IN3
NPN_DRV
BOOST
BIAS
GND
SW2
SS2
FB2
V
FB3
C2
COMMENTS
MSOP Package
V
I
3mm × 3mm DFN
V
TSSOP28E Package
V
10-Pin MS Package
V
3mm × 3mm DFN10 Package
(1mm) SOT-23 Package
V
3mm × 3mm DFN
V
5mm × 7mm QFN38 Package
3V to 25V Input, V
V
V
SD
IN
IN
IN
IN
IN
IN
IN
IN
R8
25k
C7
1nF
: 2.6V to 16V, V
: 3V to 40V, V
: 4.5V to 22V, V
: 1.2V to 15V, V
: 2.4V to 15V, V
: 2.4V to 16V, V
: 3V to 40V, V
: 4V to 36V, V
< 1μA, ThinSOT
C8
100nF
D2
C5
10nF
D3
8.2μH
L2
OUT(MIN)
OUT(MIN)
OUT(MIN)
REF
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
OUT(MAX)
TM
Package
= 1.2V, Synchronizable up to 2MHz,
R3
34k
R4
10.7k
© LINEAR TECHNOLOGY CORPORATION 2008
= 0.8V, I
= 0.8V, I
= 0.8V, I
= 34V, I
= 40V, I
= ±34V, I
= ±40V, I
= 40V, I
C2
22μF
Q
Q
Q
Q
Q
SD
= 2mA, I
= 2mA, I
= 7mA, I
LT 1108 REV A • PRINTED IN USA
Q
Q
= 4.2mA/5.5mA,
= 10mA, I
Q1
< 1 μA, Low profi le
= 20μA, I
= 40μA, I
R5
13.7k
R6
10.7k
3570 TA04
V
3.3V
500mA
SD
SD
SD
OUT2
< 1μA,
SD
< 1μA,
< 1μA,
SD
SD
C3
4.7μF
V
1.8V
500mA
< 35μA,
OUT3
< 1μA,
< 1μA,
3570fa