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RT9470 Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part # RT9470
Description  3A Single Cell Switching Battery Charger
PDF  50 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9470 Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT9470/D
Copyright © 2023 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
DS9470/D-02
October 2023
2
Marking Information
1N : Product Code
YMDNN : Date Code
RT9470WSC
1N YM
DNN
1P : Product Code
YMDNN : Date Code
1P YM
DNN
RT9470DWSC
Pin Configuration
(TOP VIEW)
INT
BATSNS
SYS
BAT
SCL
SDA
CE
SYS
BAT
STAT
QON
TS
SYS
BAT
PG
REGN
BTST
SYS
BAT
PSEL
VBUS
PMID
SW
GND
NC
VBUS
PMID
SW
GND
VAC
F4
F3
F2
F1
F5
E4
E3
E2
E1
E5
D4
D3
D2
D1
D5
C4
C3
C2
C1
C5
B4
B3
B2
B1
B5
A4
A3
A2
A1
A5
WL-CSP-30B 2.1x2.5 (BSC) (RT9470)
INT
BATSNS
SYS
BAT
SCL
SDA
CE
SYS
BAT
STAT
QON
TS
SYS
BAT
D-
REGN
BTST
SYS
BAT
D+
VBUS
PMID
SW
GND
NC
VBUS
PMID
SW
GND
VAC
F4
F3
F2
F1
F5
E4
E3
E2
E1
E5
D4
D3
D2
D1
D5
C4
C3
C2
C1
C5
B4
B3
B2
B1
B5
A4
A3
A2
A1
A5
WL-CSP-30B 2.1x2.5 (BSC) (RT9470D)
Functional Pin Description
Pin No.
Pin Name
I/O
Pin Function
RT9470
RT9470D
A1, B1
A1, B1
GND
P
Power ground.
A2, B2
A2, B2
SW
P
Switching node connecting to output inductor. Internally
SW is connected to the source of the high-side switching
MOSFET (Q2) and the drain of the low-side switching
MOSFET (Q3). Connect a 47nF bootstrap capacitor from
SW to BTST.
A3, B3
A3, B3
PMID
P
Connected to the drain of the reverse blocking MOSFET
(Q1) and the drain of high-side switching MOSFET (Q2).
Connect 10
F capacitor from PMID to GND.
A4, B4
A4, B4
VBUS
P
Charger input voltage. The internal reverse block
MOSFET (Q1) is connected between VBUS and PMID
with VBUS on source. Connect a 1
F capacitor from
VBUS to GND and place it as close as possible to IC.
A5
A5
VAC
AI
Input voltage sensing. This pin must be tied to VBUS.
B5
B5
NC
--
No internal connection.



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