LTC3455 Datasheet, PDF (24/24 Pages) Linear Technology – Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger

LTC3455
TYPICAL APPLICATIO
8
USB 5V
1Ω
C6
4.7µF
USB
CONTROLLER
6
5
WALL 5V
1Ω
C7
1µF
REMOVE THESE
COMPONENTS IF
WALL ADAPTER
IS NOT USED
10
D1
C5
10µF
3.32k
1k
4
11
1.24k
C8, 0.1µF
3
2
SINGLE
CELL Li-ION
+
3.3V TO 4.2V
2.49k
9
C4
4.7µF
1.8V
1M
LBO
17
V_BAT
2.49M
16
806k
21
USB
MODE
SUSPEND
15
HSON
19
USBHP
ON2
22
µC
PWRON
20
RST
V_MAX
23
PBSTAT
LTC3455
CHRG
WALLFB
TIMER
PROG
V_BAT
AO
AI
1M 1M
1.8V
24
ON
14
HSO
ON/OFF
3.3V, HS
C3
1µF
13
HSI
12 ^{L2, 4.7µH}
SW2
10pF
249k
18
FB2
80.6k
7 ^{L1, 4.7µH}
SW1
10pF
1
FB1
25
GND
100k
80.6k
3455 TA03
C1 TO C8: X5R OR X7R CERAMIC
L1, L2: TOKO DB318C
D1: ON SEMI MBRM110E
ALL RESISTORS 1%
3.3V
0.5A
C2
10µF
1.8V
0.4A
C1
10µF
RELATED PARTS
PART NUMBER
LT1616
LTC1879
LTC3405/LTC3405A
LTC3406/LTC3406B
LTC3407
LTC3412
LTC3414
LTC3440/LTC3441
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
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q 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
3455f
LT/TP 0304 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2004