PAM2316 Datasheet, PDF (2/11 Pages) Power Analog Micoelectronics – 2.5MHz,Fast Transient 2A Step-Down Converter

PAM2316
2.5MHz,Fast Transient 2A Step-Down Converter
Block Diagram
VIN
2.5M
OSC
SLOPE
COMP
+
IAMP
-
PVIN
FB
R1
R2
EN
FREQ
SHIFT
OSC
-
EA
VIN
+
COMP
0.6VREF
SHUTDOWN
SQ
RQ
RS LATCH
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
MAIN
SWITCH( PCH)
ANTI-
SHOOT-
THRU
SYNCHRONOUS
+ ^{RECTIFIER(NCH )}
IRCMP
-
SW
PGND
GND
Pin Configuration & Marking Information
Top View
TDFN22-8
PGND 1
PVIN 2
VIN 3
FB 4
8 SW
7 SW
6 _EN
5 AGND
CH: Product Code
of PAM2316
V: Output Voltage
Y: Year
W: Week
Pin Description
Exposed Pad (GND)
Pin NO.
1
2
3
4
5
6
7,8
Name
PGND
PVIN
V IN
FB
AGND
EN
SW
Fu nc tion
Main power ground return pin. Connect to the output and input capacitor return.
Input power supply tied to the source of the high side P-channel MOSFET.
Power supply; supplies power for the internal circuitry.
Feedback input pin. Feedback v oltage to internal error amplifier, the threshold
voltage is 0.6V.
Analog ground. This pin is internally connected to the analog ground of the
control circuitry.
Enable pin. A logic low disables the converter and it consumes less than 1μA of
current. W hen connected high, it resumes normal operation.
Switching node. Connect the inductor to this pin. It is internally connected to the
drain of both high and low side MOSFETs.
Power Analog Microelectronics, Inc
www.poweranalog.com
2
12/2011 Rev1.1