CM3708 Datasheet, PDF (2/6 Pages) List of Unclassifed Manufacturers – 3A LOOW NOISE PWM STEP DOWN REGULATOR

PIN DESCRIPTION
CM3708
3A LOW-NOISE PWM STEP-DOWN REGULATOR
Pin No.
Symbol
1,16 VIN1, VIN2
2,15 PVIN1, PVIN2
3,14 LX1, LX2
4,13
5,9,12
8
6
PGND1, PGND2
AGND
AGSEN
SD
7
VREF
10 NC
11 VFB
Description
Min.
Operating Rating
Typ.
Max.
Unit
Voltage supply for internal circuits
2
2.5
5
V
Voltage supply for output power transistors
2
2.5
5
V
Inductor connection to the Drains of the internal
5
V
power MOSFETs
Ground for output power transistors
Ground for internal reference voltage divider
Ground for remote sensing
Shutdown active high. CMOS input level
0.75 x
VIN +
V
VIN
0.3V
V_OUT Set Voltage
No Connection
1.1
VIN
V
Feedback node for the V_OUT
5
V
BLOCK DIAGRAM
NC
VIN1
VIN2
SD
10
1
16
6
PVIN1 PVIN2
2
15
AGND
5
AGND
9
AGND ¹²
VREF
7
Oscillator Ramp Generator
PWM Controller
Error Amp
Thermal
Protection
MOS
3 LX1
14 LX2
8
AGSEN
11
VFB
4
PGND1
13
PGND2
2004/09/15 Rev. 1.2
Champion Microelectronic Corporation
Page 2