rt9701b Richtek Technology Corporation, rt9701b Datasheet
rt9701b
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rt9701b Summary of contents
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... 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 is free of parasitic body diode to eliminate any reversed current flow across the switch when it is powered off. Its low quiescent current (23μ ...
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... 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 + GND 1uF Chip Enable Bias Charge Control Pump Thermal Detection V I OUT I L OUT ...
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... Current Limit Threshold Short-circuit Fold Back Current EN Input High Threshold RT9701BCB EN Input Low Threshold RT9701BCB Shutdown Supply Current RT9701BCB Output Leakage Current RT9701BCB V Under Voltage Lockout IN V Under Voltage Hysteresis IN Thermal Limit Thermal Limit Hysteresis Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings ...
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... 100 (°C) Quiescent Current vs. Input Voltage 3.5 3.8 4.0 4.3 4.5 4.8 5.0 Input Voltage (V) On-Resistance vs. Input Voltage 100 RT9701BCBL 3.5 3.8 4.0 4.3 4.5 4.8 5.0 Input Voltage(V) Current Limit vs. Input Voltage 1.80 1.58 1.35 1.13 0.90 0.68 0.45 0.23 0.00 3.5 3.8 4.0 4.3 4.5 4.8 5.0 Input Voltage (V) DS9701B-04 March 2007 T = 25°C A 5.3 5.5 5.8 6 25°C A RT9701BCB 5.3 5.5 5.8 6 25°C A 5.3 5.5 5.8 6.0 ...
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... DS9701B-04 March 2007 Preliminary 100 Rising Falling 100 (° 100 (°C) RT9701B Short Circuit Current vs. Input Voltage 1950 1.950 T = 25°C A 1700 1.7 1450 1.45 1200 1.2 950 0.95 700 0.7 450 0.45 200 0.2 3.5 3.8 4.0 4.3 4.5 4.8 5.0 Input Voltage (V) EN Threshold vs. Input Voltage 2 ...
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... 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 R = 30Ω 1uF L OUT CH1 CH2 Time (500us/Div) www.richtek.com 6 Preliminary 100 (° CH1 5V/Div EN CH2 1V/Div ...
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... IN OUT = 1uF OUT = 33uF OUT = 100uF OUT (1A/Div 5V 1Ω RT9701B Soft - start Short Circuit Response CH1 CH2 Time (50us/Div) Thermal Shut Dowm Response CH1 CH3 Thermal Shut Down CH2 CH1 5V/Div, CH3:I EN OUT CH2: I @short:1A/DiV, V OUT ...
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... 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 ...
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... MOSFET source to be externally forced to a higher voltage than the drain (VOUT > VIN reverse current from such condition, disable the switch (RT9701BCB) or connect VIN to a fixed voltage under UVLO. Layout and Thermal Dissipation Place the switch as close to the USB connector as possible ...
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... VIN VOUT IN VIN VOUT C IN GND 1uF CIN = 1uF, COUT = 470uF (Low ESR) on M/B CIN = 1uF, COUT = 330uF (Low ESR) on Notebook CIN = 10uF, COUT = 1uF on USB device Figure 1. High Side Power Switch RT9701BCB VIN VOUT VOUT GND Chip Enable V OUT2 ...
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... SOT-23-5 Surface Mount Package Richtek Technology Corporation Taipei Office (Marketing) 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com RT9701B H L Dimensions In Inches Min Max 0.035 0.051 0.000 0.006 0.055 ...