FAN5355 Просмотр технического описания (PDF) - ON Semiconductor
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FAN5355 Datasheet PDF : 27 Pages
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Pin Configuration
Top View
Bottom View
Figure 2. WLCSP-12, 2.23 x 1.46 mm
Top View
Figure 3. MLP10, 3 x 3 mm
Pin Definitions
Pin #
WLCSP MLP
Name(5) Description
A1, B1
9
PGND
Power GND. Power return for gate drive and power transistors. Connect to AGND on PCB.
The connection from this pin to the bottom of CIN should be as short as possible.
A2
10
SW Switching Node. Connect to output inductor.
A3
1
PVIN
Power Input Voltage. Connect to input power source. The connection from this pin to CIN
should be as short as possible.
Sync. When toggling and SYNC_EN bit is HIGH, the regulator synchronizes to the frequency
B2
N/A
SYNC
on this pin. In PWM mode, when this pin is statically LOW or statically HIGH, or when its
frequency is outside of the specified capture range, the regulator’s frequency is controlled by
its internal 3 MHz clock.
B3
2
AVIN
Analog Input Voltage. Connect to input power source as close as possible to the input
bypass capacitor.
C1
8, PAD
AGND
Analog GND. This is the signal ground reference for the IC. All voltage levels are measured
with respect to this pin.
C2
7
EN
Enable. When this pin is HIGH, the circuit is enabled. When LOW, quiescent current is
minimized. This pin should not be left floating.
C3
3
SDA SDA. I2C interface serial data.
D1
6
VOUT
Output Voltage Monitor. Tie this pin to the output voltage. This is a signal input pin to the
control circuit and does not carry DC current.
D2
5
VSEL
Voltage Select. When HIGH, VOUT is set by VSEL1. When LOW, VOUT is set by VSEL0. This
behavior can be overridden through I2C register settings. This pin should not be left floating.
D3
4
SCL SCL. I2C interface serial clock.
Note:
5. All logic inputs (SDA, SCL, SYNC, EN, and VSEL) are high impedance and should not be left floating. For minimum
quiescent power consumption, tie unused logic inputs to AVIN or AGND. If I2C control is unused, tie SDA and SCL to AVIN.
© 2008 Fairchild Semiconductor Corporation
3
FAN5355 • Rev. 1.1.7
www.fairchildsemi.com
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