RT9712 RICHTEK [Richtek Technology Corporation], RT9712 Datasheet
RT9712
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RT9712 Summary of contents
Page 1
... The device automatically recovers when it has sufficiently cooled down. The RT9712A/B are designed for the current limit at typically 2A and RT9712C/D are designed for the current limit at typically 1.5A. Internal circuitry controls the switch to remain off until valid input voltage is presented ...
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... RT9712 Typical Application Circuit Supply Voltage 2.7V to 5.5V RT9712B/D Chip Enable Note : R1 Pull-Up Resistance (10k to 100k) Functional Pin Description Pin No. Pin Name RT9712A/C RT9712B GND 2 2 VIN -- 3 EN1 -- 4 EN2 3 -- EN1 4 -- EN2 FLG2 VOUT2 7 7 VOUT1 FLG1 8 8 © Copyright 2012 Richtek Technology Corporation ...
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... Richtek Technology Corporation. All rights reserved. DS9712-04 November 2012 Gate Charge Control Pump Thermal Protection UVLO Gate Charge Control Pump Current Limiting Output Voltage Detection Delay Current Limiting Output Voltage Detection Delay is a registered trademark of Richtek Technology Corporation. RT9712 VOUT1 FLG1 VOUT2 FLG2 www.richtek.com 3 ...
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... OUT2 Parameter Input Quiescent Current Input Shutdown Current RT9712A/B Switch On Resistance RT9712C/D RT9712A/B Current Limit RT9712C/D Short Circuit RT9712A/B Fold-back RT9712C/D Current Logic-Low Voltage V ENx/ENx Threshold Logic-High Voltage V ENx/ENx Input Current Output Leakage Current Output Turn-On Rising Time FLGx Output Resistance ...
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... Symbol Test Conditions 0V Discharge ENx ENx V V Increasing UVLO IN ΔV V Decreasing UVLO > OUTx V < 1V OUTx is a registered trademark of Richtek Technology Corporation. RT9712 Min Typ Max Unit Ω -- 100 150 1 °C -- 120 -- °C -- 100 -- ° www ...
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... RT9712 Typical Operating Characteristics On Resistance vs. Input Voltage 2.5 3 3.5 Input Voltage (V) Quiescent Current vs. Input Voltage 50.0 47.5 45.0 42.5 40.0 37.5 35.0 32.5 30.0 27.5 25.0 22.5 20.0 2.5 3 3.5 Input Voltage (V) Shutdown Current vs. Input Voltage 0.30 0.25 0.20 0.15 0.10 0.05 0.00 2.5 3 3.5 Input Voltage (V) © Copyright 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 1.4A OUT 4 4.5 5 5.5 No Load 4 4.5 5 5.5 No Load 4 4 ...
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... 100 UVLO Threshold vs. Temperature 2.0 1.8 1.6 1.4 1.2 1.0 -40 - Temperature (°C) Short Current vs. Input Voltage 1.5 1.4 1.3 1.2 1.1 1.0 2.5 3 3.5 4 Input Voltage (V) Short Current vs. Temperature 1.5 1.4 1.3 1.2 1.1 1.0 -40 - Temperature (° registered trademark of Richtek Technology Corporation. RT9712 Rising Falling 60 80 100 4 100 www.richtek.com 7 ...
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... RT9712 FLG Delay Time vs. Input Voltage 2.5 3 3.5 Input Voltage (V) Power On from VIN V IN (2V/Div) V OUT (2V/Div) Time (2.5ms/Div) Power On from EN V OUT (2V/Div) EN1 (5V/Div) I OUT (500mA/Div) Time (100us/Div) © Copyright 2012 Richtek Technology Corporation. All rights reserved. ...
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... Besides, in order to prevent the miss-trigger because of USB plug in and other inrush current, the device allows load current greater than current limit threshold (typically 1.5A for RT9712A/B and 1A for RT9712C/ short time as shown in Figure 1. , has elapsed. This ensures D is typically 12ms. ...
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... RT9712 When the load current reaches the trigger point (typically 3.5A for RT9712A/B and 2.8A for RT9712C/D) or short circuit is applied to the output, the device will enter constant current mode until the thermal shutdown occurs or the fault is removed. Current Limit Short Circuit Fold-back Current Output Current (A) Figure 1 ...
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... BUS If the voltage drop across the PCB is limited to 100mV, the maximum resistance for the switch is 250mΩ for four ports ganged together. The RT9712A/B/C/D, with its maximum 100mΩ on-resistance over temperature can fit the demand of this requirement. Thermal Shutdown Thermal protection limits power dissipation in the RT9712A/B/C/D ...
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... Figure 3. Derating Curve of Maximum Power Dissipation Layout Consideration For best performance of the RT9712 series, the following guidelines must be strictly followed. Input and output capacitors should be placed close to the IC and connected to ground plane to reduce noise coupling. The GND should be connected to a strong ground plane for heat sink ...
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... SOP Plastic Package is a registered trademark of Richtek Technology Corporation. RT9712 H M Dimensions In Inches Min Max 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.047 0.053 0.007 ...
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... RT9712 Symbol Richtek Technology Corporation 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use ...