Preliminary RT9543
DS9543-00 August 2001 www.richtek-ic.com.tw
1
Li-Ion Battery Protector
General Description
The RT9543 Series are protection ICs for over-
charge/discharge of rechargeable one-cell Lithium-ion
(Li+) batteries by CMOS process.
The RT9543 Series can detect over-charge/discharge
of Li+ one-cell and excess load current and charge
current, further include a short circuit protector for
preventing large external short circuit current.
Each of these ICs is composed of four voltage
detectors, a reference unit, a hysteresis circuit, and a
bidirectional short circuit protector. Package of SOT-
26 is available.
Ordering Information
RT9543
Typical Application Circuit
Features
z Sustaining to 24V Charger Voltage
z Low supply current
− Supply current: TYP. 2.0µ
µµ
µA
− Standby current (after detecting over-
discharge): Less than 0.2µ
µµ
µA
z High accuracy detector threshold
− Over-charge detector: ±
±±
±50mV
− Over-discharge detector: ±
±±
±2.5%
z Built-in protection circuit
− Excess current trip/Short circuit protector in
discharging path
z Output delay of over-charge adjustable with
an external capacitor: 75mS at 0.01µ
µµ
µF
z Ultra small package: SOT26
Applications
z Over-charge / Over-discharge Protection for Li+
One-cell Pack
z High Precision Protectors for Cellular Phones or
Instruments Using Li+ One-cell Battery
Pin Configurations
Part Number Pin Configurations
RT9543CE
(Plastic SOT-26)
TOP VIEW
1. COUT
2. CT
3. VSS
4. DOUT
5. VDD
6. V-
RT9543CER
(Plastic SOT-26)
TOP VIEW
1. DOUT
2. V-
3. COUT
4. CT
5. VDD
6. VSS
64
321
5
64
321
5
Operating temperature range
C: Commercial standard
Package type
E : SOT-26 Type I
ER : SOT-26 T
y
pe II
See Table 1
RT9543
VDD
CT
VSS DOUT COUT
V-
+
R1
100Ω
C1
0.1µF
C3
0.01µF
C2
0.1µF
R2
100Ω
RT9543 Preliminary
www.richtek-ic.com.tw DS9543-00 August 2001
2
Package Information
Dimensions In Millimeters Dimensions In Inches
Symbol Min Max Min Max
A 0.889 1.295 0.035 0.051
A1 -- 0.152 -- 0.006
B 1.397 1.803 0.055 0.071
b 0.356 0.559 0.014 0.022
C 2.591 2.997 0.102 0.118
D 2.692 3.099 0.106 0.122
e 0.838 1.041 0.033 0.041
H 0.102 0.254 0.004 0.010
L 0.356 0.610 0.014 0.024
b
B
C
D
L
H
A1
e
A
Preliminary RT9543
DS9543-00 August 2001 www.richtek-ic.com.tw
3
RT9543 Preliminary
www.richtek-ic.com.tw DS9543-00 August 2001
4
RICHTEK TECHNOLOGY CORP.
Headquarter
6F, No. 35, Hsintai Road, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5510047 Fax: (8863)5537749
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek-ic.com.tw
