PAM2307 Datasheet, PDF (2/13 Pages) Power Analog Micoelectronics – 3A Low Noise Step-Down DC-DC Converter

PAM2307
3A Low Noise Step-Down DC-DC Converter
Block Diagram
VIN
1.5M
OSC
SLOPE
COMP
+
IAMP
-
FB
R1
R2
EN
FREQ
SHIFT
OSC
-
EA
VIN
+
COMP
0.6VREF
SHUTDOWN
SQ
RQ
RS LATCH
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
MAIN
SWITC H (PCH )
ANTI-
SHOOT-
THRU
SYNCHRONOUS
+ ^{RECTIFIER (NCH)}
IRCMP
-
GND
TEST
Pin Configuration & Marking Information
Top View
QFN 3X3 16L
16 15 14 13
PGND 1
PGND 2
PGND 3
FB 4
P2307A
XXXYW
12 PVIN
11 PVIN
10 PVIN
9 VIN
56 78
A: Pin Configuration
Y: Year
W: Week
X: Internal Code
PVIN
SW
PGND
Pin Description
Name
PGND
FB
GND
NC
EN
TEST
VIN
PVIN
SW
Pin Num ber
Function
1 -3
Main power ground pin
4
Feedback voltage to internal error amplifier, the threshold voltage is 0.6V.
5
Signal ground for small signal components.
6, 16
No connection
Enable control input. Force this pin voltage above 1.5V, enables the chip, and
7
below 0.3V s huts down t he dev ice.
8
Test Mode(no connect or to Ground)
9
Bias supply. Chip main power supply pin
10 -12 Input supply for power s tage. Must be c losely decoupled to PGND
13 -15 The drains of the internal main and synchronous power MOS FET.
Power Analog Microelectronics, Inc
www.poweranalog.com
2
03/2011 Rev2.1