PAM2305D
1A Step-Down DC-DC Converter
Block Diagram
+
IAMP
-
VIN
1.5M
OSC
SLOPE
COMP
FB
FREQ
SHIFT
OSC
S Q
MAIN
SWITCH( PCH)
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
R1
R2
R Q
RS LATCH
ANTI-
-
+
SW
SHOOT-
EA
THRU
VIN
SYNCHRONOUS
COMP
RECTIFIER(NCH)
0.6VREF
EN
+
IRCMP
-
SHUTDOWN
GND
Pin Configuration & Marking Information
Top View
QFN 3x3 16L
Top View
SOT23-5
Top View
DFN 2x2 6L
BK: Product Code
of PAM2305D
Y: Year
W: Week
X: Internal Code
SW
FB
VIN
GND
EN
1
2
5
16 15 14 13
NC
EN
1
2
3
6
5
4
FB
12 VIN
GND
GND
GND
FB
1
P2305D
XXXYW
11
10
9
2
VIN
VIN
VIN
GND
3
4
VIN
SW
3
4
5
6
7
8
Pin Description
Name
VIN
Function
Chipmain power supply pin
Ground
GND
Enable control input. Force this pin voltage above 1.5V, enables the chip, and below
0.3V shuts downthe device.
EN
FB
SW
NC
Feedback voltage to internal error amplifier, the threshold voltage is 0.6V.
The drains of the internal main and synchronous power MOSFET.
No connection
Power Analog Microelectronics, Inc
www.poweranalog.com
02/2012 Rev1.1
2
PAM [ POWER ANALOG MICOELECTRONICS ]
