LTC3456_15 Datasheet, PDF (28/28 Pages) Linear Technology – 2-Cell, Multi-Output DC/DC Converter with USB Power Manager

LTC3456
TYPICAL APPLICATIO
Quad-Output Converter Runs Off 2 AA Cells, USB or Wall Adapter
2 AA ⁺
CELLS
C1
4.7µF
L2
4.7µH
L3
10µH
C10
22µF
V_BATT
SW2_BST SW2_BK
V_INT
V_MAIN
USB
USBHP
A0
CONTROLLER
SUSPEND
USB POWER
(4.35V TO 5.5V)
USB
C2
AIN
4.7µF
1Ω
LTC3456
HSO
V_EXT
AC
ADAPTER
(5V ±10%)
1k
EXT_PWR
SW1
V_EXT
C3
D1
10µF
FB1
11.3k
C4
4.7µF
4.32k
1Ω
WALLFB
PWRKEY
V_MAX
PBSTAT RESET MODE PWRON PGND AGND
C9 _100k
1µF
MAIN OUTPUT
3.3V
100mA
49.9k
20k
Q2
LCD LOGIC BIAS
C8 ^2.8V
2.2µF ^10mA
L1
10µH
D2
Q1
C7
1µF
10µF
FLASH MEMORY CARD
3.3V
50mA
43.2k
CORE OUTPUT
2.5V
100mA
330pF
20.5k
V_MAX
C5
TO REAL-TIME CLOCK
1µF
(ALIVE OR SHUT DOWN)
MICROCONTROLLER
3456 TA03
C1, C6 TO C10: X5R OR X7R, 4V
L1, L3: MURATA LQH32CN100K53
C2 TO C5: X5R OR X7R, 6.3V
L2: MURATA LQH32CN4R7M53
D1, D2: ON SEMICONDUCTOR MBRM120E Q1: FAIRCHILD FDG327N
Q2: PHILIPS MMBT3906
RELATED PARTS
PART NUMBER
LT1616
LTC1879
LTC3405/LTC3405A
LTC3406/LTC3406B
LTC3407
LTC3412
LTC3414
LTC3440/LTC3441
LTC3455
DESCRIPTION
500mA (I_OUT), 1.4MHz, High Efficiency Step-Down
DC/DC Converter
1.2A (I_OUT), 550kHz, Synchronous Step-Down
DC/DC Converter
300mA (I_OUT), 1.5MHz, Synchronous Step-Down
DC/DC Converter
600mA (I_OUT), 1.5MHz, Synchronous Step-Down
DC/DC Converter
Dual 600mA (I_OUT), 1.5MHz, Synchronous Step-Down
DC/DC Converter
2.5A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
4A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
600mA/1A (I_OUT), 2MHz/1MHz, Synchronous Buck-Boost
DC/DC Converter
Dual DC/DC Converter with USB Power Manager
and Li-Ion Battery
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
90% Efficiency, V_IN: 3.6V to 25V, V_OUT(MIN) = 1.25V, I_Q = 1.9mA,
I_SD < 1µA, ThinSOT
95% Efficiency, V_IN: 2.7V to 10V, V_OUT(MIN) = 0.8V, I_Q = 15µA,
I_SD < 1µA, TSSOP16
95% Efficiency, V_IN: 2.7V to 6V, V_OUT(MIN) = 0.8V, I_Q = 20µA,
I_SD < 1µA, ThinSOT
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 20µA,
I_SD < 1µA, ThinSOT
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 40µA,
I_SD < 1µA, MS10E
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 60µA,
I_SD < 1µA, TSSOP16E
95% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 64µA,
I_SD < 1µA, TSSOP16E
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 2.5V, I_Q = 25µA/50µA,
I_SD < 1µA, MS/DFN
96% Efficiency, Seamless Transition Between Inputs, I_Q = 110µA,
I_SD < 2µA, QFN
3456fa
LT/LT 1005 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004