LTC3576-1_15 Datasheet, PDF (48/48 Pages) Linear Technology – Switching Power Manager with USB On-the-Go Triple Step-Down DC/DCs

LTC3576/LTC3576-1
TYPICAL APPLICATION
Firewire/Automotive Battery Charger with Automatic USB On-the-Go and Overvoltage Protection
AUTOMOTIVE
FIREWIRE, ETC.
7.5V TO 36V
TRANSIENTS TO 60V _{1 VIN}
4.7μF
34.2k _{3 ILIM}
V_C
4
LT3653
7
BOOST
SW ⁸
6
I_SENSE
V_OUT
5
GND HVOK
9
2
L1
0.47μF ^4.7μH
D1
22μF
J1
MICRO-AB
V_BUS
D^–
D⁺
ID
GND
USB
26 28 27
ON-THE-GO
M1
35
V_C ACPR WALL
36
C1
34 ^VBUS
SW
33
22μF
V_BUS
V_OUT
0805
6.2k
5 _OVGATE
6
32
BAT
OVSENS
L2
3.3μH
+
Li-Ion
TO USB
TRANSCEIVER
1μF _300k
LTC3576/LTC3576-1
2
LDO3V3
29
PROG
1
CLPROG
M2
11
ENOTG
3.01k
C2
22μF
0805
TO OTHER
LOADS
C3
0.1μF 1k
0402
3576 TA06
V_BUS POWERS UP WHEN ID PIN HAS LESS THAN 10Ω TO GND (MICRO-A PLUG CONNECTED)
C1, C2: TAIYO YUDEN JMK212BJ226MG
D1: DIODES INC. DFLS140
J1: HIROSE ZX62-AB-5PA
L1: COILCRAFT MSS6132-472MLC
L2: COILCRAFT LPS4018-332LM
M1: FAIRCHILD FDN372S
M2: SILICONIX Si2333DS
RELATED PARTS
PART NUMBER DESCRIPTION
Power Management
LTC3555/LTC3555-1 ^{Switching USB Power Manager with Li-Ion/Polymer}
LTC3555-3
Chargers Plus Triple Buck DC/DC
LTC3556
Switching USB Power Manager with Li-Ion/Polymer
Charger Plus Dual Buck Plus Buck-Boost DC/DC
LTC3586
Switching USB Power Manager with Li-Ion/Polymer
Charger Plus Dual Buck Plus Buck-Boost Plus Boost
DC/DC
LTC4098/LTC4098-1 ^{Switching USB Power Manager and Battery Chargers}
with Overvoltage Protection
48 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
Maximizes Available Power from USB Port, Bat-Track, 1.5A Max Charge
Current, 180mΩ Ideal Diode with <50mΩ Option, 3.3V/25mA Always-On
LDO, Two 400mA and One 1A Buck Regulators, Instant-On Operation
(LTC3555-1), Instant-On Operation and 4.1V Float Votlage (LTC3555-3),
4mm × 5mm 28-Pin QFN Package
Maximizes Available Power from USB Port, Bat-Track, Instant-On
Operation, 1.5A Max Charge Current, 180mΩ Ideal Diode with <50mΩ
Option, 3.3V/25mA Always-On LDO, Two 400mA Buck Regulators,
One 1A Buck-Boost Regulator, 4mm × 5mm 28-Pin QFN Package
Maximizes Available Power from USB Port, Bat-Track, Instant-On
Operation, 1.5A Max Charge Current, 180mΩ Ideal Diode with <50mΩ
Option, 3.3V/25mA Always-On LDO, Two 400mA Synchronous Buck
Regulators, One 1A Buck-Boost Regulator, One 600mA Boost Regulator,
4mm × 6mm 38-Pin QFN Package
Maximizes Available Power from USB Port, Bat-Track, Instant-On
Operation, 1.5A Max Charge Current, 180mΩ Ideal Diode with <50mΩ
Option, Controller for External High Voltage Buck Regulator, Protection
Against Transients of Up to 60V, 3.3V/25mA Always-On LDO,4.1V Float
Voltage (LTC4098-1), 4mm × 3mm 14-Pin DFN Package
3576fb
LT 0809 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2008