PAM2306
Dual High-Efficiency PWM Step-Down DC-DC Coverter
Typical Application
L2
VOUT2
VIN2
PAM2306
COUT2
1
2
12
VIN2
EN2
10μF
CIN2
4.7μF
11
10
9
LX2
GND
FB1
NC2
FB2
3
4
GND
8
5
6
CIN1
NC1
EN1
LX1
4.7μF
7
VIN1
VIN1
L1
VOUT1
COUT1
10μF
VOUTx = 1.2V,1.5V,1.8V,2.5V, 2.8V or 3.3V
Figure 2. Fixed Voltage Regulator
Block Diagram
VINx
+
IAMP
SLOPE
COMP
1.5M
OSC
-
PWM
COMP
OSC
FBx
MAIN
SWITCH(PCH)
S Q
FREQ
SHIFT
-
R1
R2
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
EA
+
R Q
LXx
ANTI-
SHOOT-
THRU
RS LATCH
COMP
SYNCHRONOUS
RECTIFIER(NCH)
VIN
ENx
0.6VREF
+
IRCMP
GND
SHUTDOWN
-
Power Analog Microelectronics,Inc
www.poweranalog.com
07/2008 Rev 1.0
2