XR77103-A0R5 Datasheet, PDF (6/19 Pages) Exar Corporation – Universal PMIC 3-Output Buck Regulator

Pin Configuration
XR77103-A0R5
32 31 30 29 28 27 26 25
VFB3 1
24 PGOOD
COMP3 2
23 NC
NC 3
22 NC
VIN 4
21 NC
GND 5
20 NC
VCC 6
19 DGND
COMP1 7
18 COMP2
VFB1 8
9
17 VFB2
10 11 12 13 14 15 16
Pin Functions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin Name
VFB3
COMP3
NC
VIN
GND
VCC
COMP1
VFB1
BST1
VIN1
LX1
LX1
LX2
LX2
VIN2
BST2
VFB2
COMP2
DGND
NC
Description
Buck 3 feedback pin.
Compensation pin for Buck 3. Connect a series RC circuit to this pin for compensation.
No connect.
IC supply pin. Connect a capacitor as close as possible to this pin.
Ground.
Internal supply. Connect a ceramic capacitor from this pin to ground.
Compensation pin for Buck 1. Connect a series RC circuit to this pin for compensation.
Buck 1 feedback pin.
Bootstrap capacitor for Buck 1. Connect a bootstrap capacitor from this pin to LX1.
Input supply for Buck 1. Connect a capacitor as close as possible to this pin.
Switching node for Buck 1.
Switching node for Buck 1.
Switching node for Buck 2.
Switching node for Buck 2.
Input supply for Buck 2. Connect a capacitor as close as possible to this pin.
Bootstrap capacitor for Buck 2. Connect a bootstrap capacitor from this pin to LX2.
Buck 2 feedback pin.
Compensation pin for Buck 2. Connect a series RC circuit to this pin for compensation.
Digital ground.
No connect.
REV1A
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