RT9701CB Richtek Technology Corporation, RT9701CB Datasheet

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RT9701CB

Manufacturer Part Number
RT9701CB
Description
100mOMEGA power distribution switch
Manufacturer
Richtek Technology Corporation
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
RT9701CB
Manufacturer:
RICHTEK
Quantity:
40
Part Number:
RT9701CB
Manufacturer:
RICHTEK/立錡
Quantity:
20 000
Part Number:
RT9701CBFFSF
Manufacturer:
RICHTEK
Quantity:
964
Part Number:
RT9701CBL
Manufacturer:
RICHTEK/立锜
Quantity:
20 000
General Description
The RT9701 is an integrated 100mΩ power switch
for self-powered and bus-powered Universal Series
Bus (USB) applications. A built-in charge pump is
used to drive the N-channel NMOSFET that is free
of parasitic body diode to eliminate any reversed
current flow across the switch when it is powered
off. Its low quiescent supply current (23µA) and
small package (SOT-25) is particularly suitable in
battery-powered portable equipment.
Several protection functions include soft start to limit
inrush current during plug-in, current limiting at 1.5A
to meet USB power requirement, and thermal
shutdown to protect damage under over current
conditions.
Applications
Ordering Information
RT9701
Marking Information
DS9701-05 October 2001
Part Number
RT9701CBL
RT9701CB
Battery-Powered Equipment
Motherboard USB Power Switch
USB Device Power Switch
Hot-Plug Power Supplies
Battery-Charger Circuits
Operating temperature range
Package type
BL : SOT-25
B : SOT-25
C: Commercial standard
Marking
AH
C0
100mΩ Power Distribution Switches
Features
Pin Configurations
Typical Application Circuit
RT9701CBL
(Plastic SOT-25)
RT9701CB
(Plastic SOT-25)
Part Number
V
100mΩ Typ. High-Side NMOSFET (SOT- 25)
Guaranteed 1.1A Continuous Current
1.5A Current Limit
Small SOT- 25 Package Minimizes Board Space
Soft Start
Thermal Protection
Low 23µA Supply Current
Wide Input Voltage Range: 2.2V ~ 6V
UL Approved - #E219878
IN
1 µF
C
I N
* 470µF, Low ESR Electrolytic
VIN
VIN
RT9701 CBL
GND
5
1
5
1
Pin Configurations
VOUT
VOUT
2
2
4
3
4
3
RT9701
www.richtek.com
*C
1. VOUT
2. GND
3. VIN
4. VIN
5. VOUT
1. VOUT
2. GND
3. VIN
4. CE
5. VOUT
TOP VIEW
TOP VIEW
470 µF
OUT
V
OUT
1

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RT9701CB Summary of contents

Page 1

... Current Limit Small SOT- 25 Package Minimizes Board Space Soft Start Thermal Protection Low 23µA Supply Current Wide Input Voltage Range: 2. Approved - #E219878 Part Number Pin Configurations RT9701CBL 5 (Plastic SOT-25 RT9701CB 5 4 (Plastic SOT-25 RT9701 CBL V VIN VOUT IN VIN VOUT ...

Page 2

RT9701 Pin Description Pin Name Pin Function VIN Power Input VOUT Output Voltage GND Ground CE Chip Enable Test Circuits C Test Circuit 2 is performed by charging an external tank of bulk capacitor to the input then applying this ...

Page 3

Function Block Diagram CE Absolute Maximum Ratings Supply Voltage Chip Enable Power Dissipation SOT-25 Operating Junction Temperature Range Storage Temperature Range Package Thermal Resistance SOT-25, θ ESD Level OUT HBM (Human Body Mode) ...

Page 4

... RT9701CB Supply Current Output Turn-On Rising Time Current Limit Threshold Short-circuit Fold Back Current CE Input High Threshold RT9701CB CE Input Low Threshold RT9701CB Shutdown Supply Current RT9701CB Output Leakage Current RT9701CB V Under Voltage Lockout IN V Under Voltage Hysteresis IN Thermal Limit Thermal Limit Hysteresis www ...

Page 5

... Supply Current vs. Voltage 2.0 2.5 3.0 3.5 4.0 4.5 V Voltage (V) Voltage (V) IN On-Resistance vs. Voltage 160 140 120 100 2.0 2.5 3.0 3.5 4.0 4.5 Voltage (V) V Voltage (V) IN Current Limit vs. Voltage 1.80 1.58 1.35 1.13 0.90 0.68 0.45 0.23 0.00 2.0 2.5 3.0 3.5 4.0 4.5 Voltage (V) V Voltage (V) IN RT9701 ° 5.0 5.5 6 ° 25°C A RT9701CBL RT9701CBL 5.0 5.5 6 25°C A 5.0 5.5 6.0 www.richtek.com 5 ...

Page 6

RT9701 Short Circuit Current vs. Temp. 1400 1300 1200 1100 1000 900 800 700 600 500 -40 - Temperature ( CE Threshold vs. Temp. 2.4 2.0 1.6 1.2 0.8 0.4 0.0 -40 - Temperature ...

Page 7

Shutdown Supply Current vs. Temp. 0.9 0.8 0.6 0.5 0.3 0.2 0.0 -40 - Temperature ( UVLO Threshold vs. Temp. 3.50 3.00 2.50 2.00 1.50 1.00 0.50 0.00 -40 - Temperature ( Turn-On Response ...

Page 8

RT9701 UVLO at Rising T CH1 1 > CH2 2 > Time (500µS/Div) Inrush Short Circuit Response T V =1.2V, depend on C DROP I : depend on ESR & ESL PEAK 1 > CH1 CH1 : V ...

Page 9

Thermal Shut Down Response T CH1 1 > CH3 Thermal Shut Down T T CH2 2 > CH1 5V/Div CE Ω : 1A/Div CH3 1ohm : 500mA/Div 1A/Div OUT L CH2: I @short : 500mA/Div 1A/Div ...

Page 10

... The output MOSFET and driver circuitry are also designed to allow the MOSFET source to be externally forced to a higher voltage than the drain (VOUT > VIN ≥ 0). To prevent reverse current from such condition, disable the switch (RT9701CB) or connect VIN to a fixed voltage under 1.3V. Layout and Thermal Dissipation V ...

Page 11

Package Information C A Symbol DS9701-05 October 2001 Dimensions In Millimeters Min Max 0.889 1.295 0.000 0.152 1.397 1.803 0.356 0.559 2.591 2.997 2.692 3.099 0.838 ...

Page 12

RT9701 RICHTEK TECHNOLOGY CORP. Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com 12 RICHTEK TECHNOLOGY CORP. Taipei Office (Marketing) 8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taipei, R.O.C. ...

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