RT9701BGB RICHTEK [Richtek Technology Corporation], RT9701BGB Datasheet

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RT9701BGB

Manufacturer Part Number
RT9701BGB
Description
100m? Power Distribution Switches
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet
100m Ω Ω Ω Ω Ω Power Distribution Switches
General Description
The RT9701B 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
body diode to eliminate any reversed current flow across
the switch when it is powered off. Its low quiescent current
(23μA) and small package (SOT-23-5) 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.
Ordering Information
Note :
RichTek Pb-free and Green products are :
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
DS9701B-04 March 2007
RT9701B
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
100% matte tin (Sn) plating.
ments of IPC/JEDEC J-STD-020.
N-Channel MOSFET that is free of parasitic
Package Type
B : SOT-23-5
BL : SOT-23-5 (L-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Preliminary
Features
Applications
Pin Configurations
VOUT
Typical Application Circuit
GND
100mΩ Ω Ω Ω Ω Typ. High-Side NMOSFET
Guaranteed 1.1A Continuous Current
1.5A Current Limit
Small
Soft Start
Thermal Protection
Low 23μ μ μ μ μ A Supply Current
Wide Input Voltage
UL Approved - #E219878
RoHS Compliant and 100% Lead (Pb)-Free
Battery-Powered Equipment
Motherboard USB Power Switch
USB Device Power Switch
Hot-Plug Power Supplies
Battery-Charger Circuits
V
VIN
IN
1uF
C
IN
SOT-23-5
SOT-23-5
1
2
3
* 470uF, Low ESR Electrolytic
5
4
Package Minimizes Board Space
VOUT
EN
VIN
VIN
(TOP VIEW)
Range : 3.5V to 6V
RT9701B
GND
VOUT
VOUT
VOUT
GND
VIN
SOT-23-5
RT9701B
www.richtek.com
1
2
3
(L-Type)
5
4
* C
470uF
OUT
VOUT
VIN
V
OUT
1

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RT9701BGB Summary of contents

Page 1

Power Distribution Switches General Description The RT9701B 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 MOSFET that ...

Page 2

RT9701B Test Circuits V IN_SW Functional Pin Description Pin Name Pin Function VIN Power Input Voltage VOUT Output Voltage GND Ground EN Chip Enable (Active High) Function Block Diagram EN Oscillator www.richtek.com 2 Preliminary RT9701B VIN ...

Page 3

Absolute Maximum Ratings Supply Voltage ------------------------------------------------------------------------------------------------------------- 7V Chip Enable ----------------------------------------------------------------------------------------------------------------- Power Dissipation 25° SOT-23-5 -------------------------------------------------------------------------------------------------------------------- Package Thermal Resistance (Note 3) SOT-23-5, θ --------------------------------------------------------------------------------------------------------------- 250° Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C Operating ...

Page 4

RT9701B Typical Operating Characteristics (Refer to Test Circuit) Quiescent Current vs. Temperature - Temperature On-Resistance vs. Temperature 200 175 150 125 100 -20 -5 ...

Page 5

Short Circuit Current vs. Temperature 1400 1.4 1300 1.3 1200 1.2 1100 1.1 1000 1.0 900 0.9 800 0.8 700 0.7 600 0.6 500 0.5 - Temperature (°C) EN Threshold vs. Temperature 2.4 2.0 1.6 1.2 0.8 ...

Page 6

RT9701B Turn-Off Leakage Current vs. Temperature 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 - Temperature Turn - On Response CH1 CH2 Time (100us/Div) UVLO at Rising CH1 1V/Div IN CH2 1V/Div OUT ...

Page 7

Inrush Short Circuit Response V DROP I PEAK CH1 CH2 CH2 1A/Div L Time (25us/Div) Ramped Load Response CH1 V = OUT 4.9V Current Limit Threshold CH2 CH2 500mA/Div OUT Time (1ms/Div) Current Limit Response C ...

Page 8

RT9701B Current Limit Response Loading trigger CH1 CH2 CH2 1A/Div OUT Time (5us/Div) www.richtek.com 8 Preliminary 0.1uF IN OUT R = 1Ω L DS9701B-04 March 2007 ...

Page 9

Application Information The RT9701B is a high-side single switch with active-high enable input. Input and Output VIN (input) is the power supply connection to the circuitry and the drain of the output MOSFET. VOUT (output) is the source of the ...

Page 10

RT9701B If the package is with dual VOUT or VIN pins, short both the same function pins as Figure 1 or Figure 2 to reduce the internal turn-on resistance. If the output power will be delivered to two individual ports, ...

Page 11

Outline Dimension Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 DS9701B-04 March 2007 Preliminary ...

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