Datasheet

1
2
3
4
13
14
15
16
V
IN2
SW2
PGND2
V
DD
FB2
EN2
EN1
nPOR2
5
12
SGND
nPOR1
6
7
8
10
11
9
PGND1
SW1
V
IN1
FB1
SDA
SCL
LM3370
www.ti.com SNVS406N –NOVEMBER 2005–REVISED MAY 2013
Figure 1. WSON Connection Diagram
(See Package Number NHR0016B)
PIN DESCRIPTIONS (WSON)
Pin # Name Description
1 V
IN2
Power supply voltage input to PFET and NFET switches for Buck 2
2 SW2 Buck 2 Switch Pin
3 PGND2 Buck 2 Power Ground
4 V
DD
Signal supply voltage input, V
DD
must be equal or greater of the two inputs (V
IN1
and V
IN2
)
5 SGND Signal GND
6 PGND1 Buck 1 Power Ground
7 SW1 Buck 1 Switch Pin
8 V
IN1
Power supply voltage input to PFET and NFET switches for Buck 1
9 FB1 Analog Feedback Input for Buck 1
10 SDA I
2
C-Compatible Data, a 2 kΩ pull up resistor is required
11 SCL I
2
C-Compatible Clock, a 2 kΩ pull up resistor is required
Power ON Reset for Buck 1, Open drain output Low when Buck 1 output is 92% of target
12 nPOR1
output. A 100 kΩ pull up resistor is required
Power ON Reset for Buck 2, Open drain output Low when Buck 2 output is 92% of target
13 nPOR2
output. A 100 kΩ pull up resistor is required
14 EN1 Buck 1 Enable
15 EN2 Buck 2 Enable
16 FB2 Analog feedback for Buck 2
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