LTC3576 Datasheet, PDF (45/48 Pages) Linear Technology – Switching Power Manager with USB On-the-Go + Triple Step-Down DC/DCs

LTC3576/LTC3576-1
TYPICAL APPLICATIONS
High Efficiency USB/Automotive Power Manager with Current Limiting and
Overvoltage Protection on Both Inputs, Low-Battery Start-Up and USB On-the-Go
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
USB,
WALL
ADAPTER
USB
ON-THE-GO
26 28 27
M1
35
V_C ACPR WALL
36
C1
34 ^VBUS
SW
33
22μF
0805
V_BUS
V_{OUT 31}
IDGATE
R1
6.2k
5
OVGATE
6
32
BAT
OVSENS
L2
3.3μH
+
Li-Ion
C3
22μF
0805
TO OTHER
LOADS
100k
R2
100k
T
1k
C2
0.1μF
0402
3 _NTCBIAS
4
NTC
29
PROG
1
CLPROG
3.01k
8
V_IN1
9
SW1
7
FB1
LTC3576/LTC3576-1
L3
4.7μH
1.02M
324k
1.76V TO 3.3V
400mA
10pF
1μF
10μF
MEMORY
PUSHBUTTON
MICROCONTROLLER
2
LDO3V3
1μF
12
DV_CC
30 _CHRG
13, 14
I²C
10
EN1
22
EN2
19
EN3
11
ENOTG
37
38 ^ILIM0
I_LIM1
24
V_IN2
23
SW2
L4
4.7μH
25
FB2
1.02M
365k
16
V_IN3
L5
17 ^2μH
SW3
751k
20
FB3
806k
1.61V TO 3.03V
400mA
I/O
10pF
1μF
10μF
MICROPROCESSOR
0.8V TO 1.51V
1A
CORE
POR
10pF
1μF
10μF
10k
RST3 ²¹
C1, C3: TAYIO YUDEN JMK212BJ226MG
D1: DIODES INC. DFLS140
L1: COILCRAFT MSS6132-472MLC
L2: COILCRAFT LPS4018-332LM
L3, L4: TOKO 1098AS-4R7M
L5: TOKO 1098AS-2R0M
M1: FAIRCHILD FDN327S
R1: 1/10W RESISTOR
R2: CURVE 1
3576 TA05
3576f
45