LTC3520 Linear Technology, LTC3520 Datasheet - Page 24

• Manufacturer Part Number: LTC3520
• Description: Synchronous 1A Buck-Boost and 600mA Buck Converters
• Manufacturer: Linear Technology

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RELATED PARTS
LTC3520
TYPICAL APPLICATION
PART NUMBER
LTC3410/
LTC3410B
LTC3440
LTC3441
LTC3442
LTC3443
LTC3444
LTC3455
LTC3456
LTC3522
LTC3530
LTC3532
LTC3548
24
C1, C2, C3: TAIYO YUDEN CERAMIC
L1: TDK RLF7030T-4R7M3R4 4.7µH
L2: TDK RLF7030T-3R3M4R 3.3µH
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
JMK212BJ226MG-T
600mA
V
DESCRIPTION
300mA (I
DC/DC Converter
600mA (I
Boost DC/DC Converter
1.2A (I
Boost DC/DC Converter
1.2A (I
Boost DC/DC Converter
600kHz, 1.2A, Synchronous Buck-Boost
DC/DC Converter
1.5MHz, 400mA, Synchronous Buck-Boost
DC/DC Converter
Dual DC/DC Converter with USB Power
Manager and Li-Ion Battery Charger
Two Cell Multi-Output DC/DC Converter
with USB Power Manager
400mA (I
and 200mA Buck DC/DC Converters
600mA (I
Boost DC/DC Converter
500mA (I
Boost DC/DC Converter
400mA/800mA, 2.25MHz Dual
Synchronous Step-Down DC/DC Converter
1.8V
OUT
OUT
OUT
●
OUT
OUT
OUT
OUT
OUT
), 2MHz Synchronous Buck-
), 2MHz Synchronous Buck-
Li-Ion
FAX: [phone]
C2
22µF
), 2.25MHz Synchronous Buck
), 2MHz Synchronous Buck-
) Synchronous Buck-Boost
), 2MHz Synchronous Buck-
), 2MHz Synchronous Buck-
BURST
V
2.2V TO 4.2V
IN
255k
200k
OFF
PWM
ON
C1
22µF
27pF
3.3µH
●
L2
www.linear.com
3.3nF
54.9k
301k
Li-Ion to 3.3V at 500mA and 1.8V at 600mA
SW2
FB2
SS2
R
PWM1
PWM2
SD3
SD2
SD1
PV
T
IN1
with Low Battery Detection
PGND1
COMMENTS
V
V
V
V
95% Effi ciency, V
Package
V
96% Effi ciency, Seamless Transition Between Inputs, I
92% Effi ciency, Seamless Transition Between Inputs, I
V
I
V
MSOP Packages
V
MSOP Packages
95% Effi ciency, V
MSOP Packages
Q
PV
IN
IN
IN
IN
IN
IN
IN
IN
= 25µA, I
: 2.5V to 5.5V, V
: 2.5V to 5.5V, V
: 2.4V to 5.5V, V
: 2.4V to 5.5V, V
: 2.75V to 5.5V, V
: 2.4V to 5.5V, Buck-Boost V
: 1.8V to 5.5V, V
: 2.4V to 5.5V, V
IN2
LTC3520
PV
SGND
IN3
SD
SV
PGND2
< 1µA, QFN Package
IN
IN
IN
SW1A
SW1B
V
3520 TA04
OUT(RANGE)
OUT(RANGE)
OUT(RANGE)
OUT(RANGE)
: 2.4V to 5.5V, V
OUT(RANGE)
OUT(RANGE)
: 2.5V to 5.5V, V
A
OUT1
SS1
FB1
OUT(RANGE)
V
OUT
A
C1
IN
470pF
3.3nF
LOW BATTERY OUTPUT
4.7µH
THRESHOLD = 2.3V
L1
: 0.8V to V
: 2.5V to 5.5V, I
: 2.4V to 5.25V, I
: 2.4V to 5.25V, I
: 1.8V to 5.5V, I
: 2.4V to 5.25V, I
(ACTIVE LOW)
: 0.5V to 5V, I
OUT(RANGE)
BAT_LOW
15k
OUT(RANGE)
OUT(MIN)
10k
IN
56pF
: 2.2V to 5.25V, Buck V
, I
= 0.6V, I
Q
SD
Q
Q
: 2.4V to 5.25V, I
= 26µA, I
Q
Q
Q
= 25µA, I
= 40µA, I
< 1µA, DFN Package
1M
309k
= 25µA, I
= 35µA, I
= 35µA, I
Q
© LINEAR TECHNOLOGY CORPORATION 2007
Q
Q
= 40µA, I
SD
V
= 110µA, I
= 180µA, I
SD
SD
IN
SD
SD
SD
< 1µA, SC70 Packages
750k
392k
< 1µA, MS and DFN Packages
< 1µA, DFN and
C3
22µF
< 1µA, DFN Package
< 1µA, DFN Package
< 1µA, DFN and
Q
SD
= 25µA, I
OUT(RANGE)
V
3.3V
500mA
1A FOR V
SD
SD
< 1µA, DFN and
OUT
LT 0807 • PRINTED IN USA
< 2µA, QFN Package
< 1µA, QFN Package
IN
SD
≥ 3V
: 0.6V to V
< 1µA, DFN
3520f
IN
,