FAN5403 Fairchild Semiconductor, FAN5403 Datasheet - Page 4

• Manufacturer Part Number: FAN5403
• Description: The FAN5403 combines a highly integrated switched-mode charger, to minimize single-cell Lithium-ion (Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery
• Manufacturer: Fairchild Semiconductor

Pin Configuration
Pin Definitions
© 2009 Fairchild Semiconductor Corporation
FAN5400 Family • Rev. 1.0.7
A1, A2
B1-B3
C1-C3
D1-D3
Pin #
C4
D4
A3
A4
B4
E1
E2
E2
E3
E4
AUXPWR
DISABLE
Name
PGND
VREG
VBUS
STAT
VBAT
PMID
CSIN
OTG
SDA
SCL
SW
NC
C1
D1
A1
B1
E1
FAN5400,
FAN5401,
FAN5403,
FAN5404,
FAN5402
FAN5405
Part #
Top View
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
A2
B2
C2
D2
E2
A3
B3
C3
D3
E3
Description
Charger Input Voltage and USB-OTG output voltage. Bypass with a 1F capacitor to
PGND.
No Connect. No external connection is made between this pin and the IC’s internal
circuitry.
I
Power Input Voltage. Power input to the charger regulator, bypass point for the input
current sense, and high-voltage input switch. Bypass with a minimum of 4.7F, 6.3V
capacitor to PGND.
I
Switching Node. Connect to output inductor.
Status. Open-drain output indicating charge status. The IC pulls this pin LOW when charge
is in process.
Power Ground. Power return for gate drive and power transistors. The connection from this
pin to the bottom of C
On-The-Go. Enables boost regulator in conjunction with OTG_EN and OTG_PL bits (see
Table 16). On VBUS Power-On Reset (POR), this pin sets the input current limit for t
charging.
Current-Sense Input. Connect to the sense resistor in series with the battery. The IC uses
this node to sense current into the battery. Bypass this pin with a 0.1F capacitor to PGND.
Auxiliary Power. Connect to the battery pack to provide IC power during High-Impedance
Mode. Bypass with a 1F capacitor to PGND.
Charge Disable. If this pin is HIGH, charging is disabled. When LOW, charging is
controlled by the I
does not affect the 32-second timer.
Regulator Output. Connect to a 1F capacitor to PGND. This pin can supply up to 2mA of
DC load current. For FAN5400-FAN5402, the output voltage is PMID, which is limited to
6.5V. For FAN5403-FAN5405, the output voltage is regulated to 1.8V.
Battery Voltage. Connect to the positive (+) terminal of the battery pack. Bypass with a
0.1F capacitor to PGND if the battery is connected through long leads.
2
2
C Interface Serial Clock. This pin should not be left floating.
C Interface Serial Data. This pin should not be left floating.
A4
B4
C4
D4
E4
Figure 4. WLCSP-20 Pin Assignments
2
C registers. When this pin is HIGH, the 15-minute timer is reset. This pin
MID
should be as short as possible.
4
C4
D4
A4
B4
E4
Bottom View
A3
B3
C3
D3
E3
C2
D2
A2
B2
E2
A1
B1
C1
D1
E1
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