RT7262A
Marking Information
RT7262AZQW
07 : Product Code
Pin Configurations
(TOP VIEW)
VIN
SW
SW
SW
SW
BOOT
EN/SYNC
1
2
3
4
5
6
7
14
13
07 YM
DNN
YMDNN : Date Code
GND
15
12
11
10
9
8
AGND
GND
GND
VCC
SS
PGOOD
FB
RT7262AZSP
RT7262AZSP : Product Number
WDFN-14L 4x3
VIN
SW
SW
BOOT
2
3
4
8
RT7262A
ZSPYMDNN
YMDNN : Date Code
GND
VCC
FB
EN/SYNC
GND
9
7
6
5
SOP-8 (Exposed Pad)
Functional Pin Description
Pin No.
WDFN-14L 4x3
SOP-8
(Exposed Pad)
1
Pin Name
Pin Function
Power Input. VIN supplies the power to the IC, as well as the
step-down converter switches. Drive VIN with a 4.5V to 21V
power source. Bypass VIN to GND with a suitably large
capacitor to eliminate noise on the input to the IC.
Switch Node. SW is the switching node that supplies power to
the output. Connect the output LC filter from SW to the output
load. Note that a capacitor is required from SW to BOOT to
power the high side switch.
Bootstrap for High Side Gate Driver. Connect a 100nF or greater
capacitor from SW to BOOT to power the high side switch driver.
Enable or External Frequency Synchronization Input. For
automatic start-up, connect the EN/SYNC pin to VIN with a
100kΩ resistor. The switching frequency can be changed by an
external clock applying to the SYNC pin.
Feedback Input. FB senses the output voltage via an external
resistive voltage divider. The feedback reference voltage is
0.808V typically.
Power Good Indicator is an Open Drain Output. The power good
rising/falling threshold is 90%/70% of regulation output voltage.
Soft-Start Control Input. Connect a capacitor from SS to GND to
set the soft-start period.
Bias Supply. Decouple with 0.1μF to 0.22μF capacitor between
this pin and GND.
Ground. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
Analog Ground. Connect this pin to the system ground in PCB
layout.
1
VIN
2, 3, 4, 5
2, 3
SW
6
4
BOOT
7
5
EN/SYNC
8
6
FB
9
10
11
--
--
7
PGOOD
SS
VCC
12, 13, 15
8,
GND
(Exposed Pad) 9 (Exposed Pad)
14
--
AGND
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS7262A-01
September 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
