SC704 SEMTECH | Alldatasheet

Document overview

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Technical content

Features

Input Voltage Range – .V to 3.6V 500mA Continuous Output Current Ultra-Low Ron – 90mΩ Automatic Output Discharge Circuit Fast Turn-on Option With No Output Discharge Circuit – SC704 Extended Soft Start Option With Automatic Out - put Discharge Circuit – SC705 Low Shutdown Quiescent Current Hardened ESD Protection 5kV Package: CSP – 0.76mm × 0.76mm, 0.4mm Pitch

Applications

Description

The SC704/SC705 is a low input voltage, low Ron load switch, designed for use in battery powered applications. Integrated circuitry controls the switch to minimize resis - tance over a wide range of conditions. The device provides controlled soft-start to limit inrush current. The SC705 features an automatic discharge circuit which discharges the output when the part is disabled. The SC704/SC705 is offered in an ultra-small 4-bump 0.76mm×0.76mm Chip Scale Package (CSP) which enables very small board area implementations. The SC704/SC705 has an operating temperature range of -40 °C to +85°C. SC704 / SC705 SU PPLY LOADVOU TVIN EN GN DEN ABLE VIN 1µF 1µF Typical Application Circuit Rev. 2.4 Device Package Automatic Discharge Rising Time SC704 CSP No 6.7µs(Typ.) SC705 CSP Yes 37µs(Typ.)

Ordering Information

SC704CSTRT CSP 0.76mm×0.76mm 4-bump SC705CSTRT CSP 0.76mm×0.76mm 4-bump SC704EVB Evaluation Board SC705EVB Evaluation Board Notes: () Available in tape and reel only. A reel contains 5,000 devices. (2) Lead-free packaging only. Device is WEEE and RoHS compliant, and halogen free. A 1 A 2 B 1 B 2 T O P V IE W (B U M P S O N T H E B O T T O M) CSP 0.76x0.76, 4 Bump SC704 SC705 Marking for the 0.76 x 0.76 mm CSP 4 Lead Package : O = Pin ID nn = Part No. Code (Example: AN) - Reference Part No. Marking for the 0.76 x 0.76 mm CSP 4 Lead Package : O = Pin ID nn = Part No. Code (Example: AP) - Reference Part No.

Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not recommended. NOTES: () Tested according to JEDEC standard JESD22-A4-B. (2) Assumes 3 x 4.5 inch, 4 layer FR4 PCB per JESD5 with 4 mil (00 micron) width traces connected to ball pads. Absolute Maximum Ratings Recommended Operating Conditions CIN Input Capacitance = uF Thermal Information Thermal Resistance, Junction to Ambient(2) (°C/W) . . . 60 Unless otherwise noted VIN = .8V, CIN = μF, COUT = μF, VEN = VVIN, TA = -40°C to +85°C. Typical values are at TA = 25°C. Parameter Symbol Conditions Min Typ Max Units Input Supply Voltage Range VIN . 3.6 V Output Voltage VOUT VIN V Maximum Output Current IMAX Continuous current 500 mA On Resistance (Ron) RON VIN =3.6V, IOUT = 200mA, VVEN =.5V 64 mΩ VIN =2.5V, IOUT = 200mA, VVEN =.5V 72 mΩ VIN =.8V, IOUT = 200mA, VVEN =.5V 90 30 mΩ VIN =.5V, IOUT = 200mA, VVEN =.5V 98 mΩ VIN =.2V, IOUT = 200mA, VVEN =.0V 26 mΩ Shutdown Current ISD VEN =0V , VOUT open, TA = 25°C 0. μA VEN =0V , -40°C <= TA <= 85°C 2 μA Quiescent Current IQ () VIN =VEN =3.6V, VOUT open, -40°C <= TA <= 85°C 2 µA Enable EN Input High Threshold VIH . V ENABLE Input Low Threshold VIL 0.3 V

Electrical Characteristics

Parameter Symbol Conditions Min Typ Max Units EN Input Pull-Down Resistance REN 5 MΩ SC704 Turn-on Delay Time TDT VIN =.8V, IOUT = 200mA, VVEN =.5V 5 µs VIN =3.6V, IOUT = 200mA, VVEN =.5V .5 µs Rising Time TRT VIN =.8V, IOUT = 200mA, VVEN =.5V 6.7 µs Falling Time TFT VIN =.8V, IOUT = 500mA, VVEN =.5V 3.7 µs SC705 Turn-on Delay Time TDT VIN =.8V, IOUT = 200mA, VVEN =.5V 00 µs VIN =3.6V, IOUT = 200mA, VVEN =.5V 50 µs Rising Time TRT VIN =.8V, IOUT = 200mA, VVEN =.5V 37 µs Falling Time TFT VIN =.8V, IOUT = 500mA, VVEN =.5V 7.2 µs Output Pull-Down Resistance RPD VIN =.8V 220 Ω Electrical Characteristics (continued) Notes: () IQ current includes EN pull-down current.

Time (2ms/div) Start Up by VIN Start up by EN Start up by EN 1.8Vin, 0A Typical Characteristics (SC704) VOUT 1V/div. VIN 1V/div. IOUT 0.2A/div. 3.6Vin,0A Time (5us/div) VIN 1V/div. IIN 0.2A/div. VOUT 1V/div. Testingcondition:VIN=3.6V,Iout=0.5A, C2=1uF,25ɗĭġCRMode,Chroma63030 T6(Vout) T5(Vin) Iout Start up by VIN 3.6Vin, 0.5A EN 2V/div. Time (5us/div) Time (5ms/div) Shutdown by VIN VOUT 1V/div. VIN 1V/div. IOUT 0.2A/div. 3.6Vin, 0.5A Testing condition: VIN=3.6V, Iout=0.5A, C2=1uF, CR mode, 25ɗ T6(Vout) T5(Vin) Iout Shutdown by VIN StartupbyEN(VINleadEN) Testingcondition:VIN=1.8V,25Ԩ, Iout=0.2A,C1=C2=1uF,CRMode Testingcondition:VIN=3.6V,25Ԩ, Iout=0.2A,C1=C2=1uF,CRMode Iin T6(Vout) T5(Vin) Iin T6(Vout) EN T5(Vin) EN StartupbyEN(VINleadEN) Testingcondition:VIN=1.8V,25Ԩ, Iout=0.2A,C1=C2=1uF,CRMode Testingcondition:VIN=3.6V,25Ԩ, Iout=0.2A,C1=C2=1uF,CRMode Iin T6(Vout) T5(Vin) Iin T6(Vout) EN T5(Vin) EN VIN 2V/div. IIN 1A/div. VOUT 2V/div. EN 2V/div. Time (10us/div) VOUT 0.4V/div. IOUT 0.1A/div. Shutdown by EN VIN 1V/div. 1.8Vin, 9 Ω EN 1.5V/div.

Start up by EN Start up by EN 1.8Vin, 0.2A Typical Characteristics (SC705) 3.6Vin,0.2A Time (10us/div) IOUT 0.1A/div. VOUT 0.4V/div. Time (50us/div) VOUT 0.5V/div. IIN 0.1A/div. IOUT 0.1A/div. Shutdown by EN VIN 1V/div. EN 1.5V/div. 1.8Vin,9 Ω EN 2V/div. Time (50us/div) Testingcondition:VIN=3.6V,25Ԩ, RL=18Ÿ,C1=C2=1uF Testingcondition:VIN=1.8V,25Ԩ, RL=9Ÿ,C1=C2=1uF T6(Vout) Iin Iout EN T6(Vout) Iin Iout EN StartupbyEN(SC705) Testingcondition:VIN=3.6V,25Ԩ, RL=18Ÿ,C1=C2=1uF Testingcondition:VIN=1.8V,25Ԩ, RL=9Ÿ,C1=C2=1uF T6(Vout) Iin Iout EN T6(Vout) Iin Iout EN StartupbyEN(SC705) VOUT 0.8V/div. IIN 0.1A/div. IOUT 0.1A/div. EN 2V/div. Time (5ms/div) Start Up by VIN VOUT 1V/div. VIN 1V/div. IOUT 0.2A/div. Shutdown by VIN Time (10ms/div) VIN 1V/div. IOUT 0.2A/div. 3.6Vin, 0.5A Start up by Vin Testing condition: VIN=3.6V, Iout=0.5A, C2=1uF, CR mode, 25кк кк T6(Vout) T5(Vin) Iout 3.6Vin, 0.5A Shutdown by VIN Testing condition: VIN=3.6V, Iout=0.5A, C2=1uF, CR mode, 25кк кк T6(Vout) T5(Vin) Iout VOUT 1V/div. Time (.2mS/div) IOUT 0.1A/div. VOUT 0.4V/div. Shutdown by EN VIN 0.4V/div. EN 1.5V/div. 1.8Vin,0A

Typical Characteristics, Cont. Quiescent Current (uA) On Resistance (mΩ) Temperature (°C) On Resistance vs. Temperature Quiescent Current vs. Temperature Temperature (°C) EN Input Pull-Down Resistance ( MΩ EN Input Pull-Down Resistance vs. Temperature Temperature (°C)

Pin # Pin Name Pin Function A VIN Input supply voltage. B EN Enable input. Drive high to turn on the switch; drive low to turn off the switch. Floating is low. A 5MΩ internal resis- tor is connected to GND. In SC705 the EN input engages the automatic discharge function when the input is at logic Low. A2 OUT Output voltage. B2 GND Ground. Turn-on Delay Rise Time Turn-off Delay 90% 10% VEN VOUT Fall Time (Turn on time)=(Turn-on Delay)+(Rise Time) Timing Diagram Figure 1

VIN(1.1~3.6V) VOUT EN GND C2Slew Rate Control SC704 ILoad (Up to 500mA) VIN(1.1~3.6V) VOUT EN GND C2Slew Rate Control SC705 ILoad (Up to 500mA) SC704 SC705

Application Information

The SC704/SC705 are integrated high-side PMOS load switches that are designed to support up to 500mA con - tinuous output current and operate from an input voltage between .V to 3.6V. The internal PMOS pass element has a very low on resistance of 90mΩ (typical) at .8V. The Enable pin incorporates a 5MΩ (typical) pull-down resis - tor. The SC704/SC705 also provides ultra-low low shut - down and quiescent current for extended battery life during shutdown and light loading conditions. The SC705 includes an automatic output discharge func - tion which employs a 220Ω (typical) discharge path to ground when the EN pin is disabled. The SC705 is also designed for longer output rise time to decrease input inrush current during power on. Enable The gate of the internal PMOS FET of SC704/SC705 is con- trolled by EN pin logic circuitry. If the EN pin is floating, the internal switch will be turned off. In SC705 the EN pin also controls the automatic discharge function. Input Capacitor In order to improve voltage drop, noise and bounce on VIN pin, a filter/decoupling capacitor between VIN to GND is recommended. A uf ceramic capacitor will be suffi - cient for most application conditions. However it should be noted that suppressing bounce on input loop after EN from high to low can require greater capacitor values depending on the particular design being implemented. During certain shutdown conditions, as in the case when input power supply is abruptly removed, the input voltage may tend to drop faster than the output voltage. In this event a reverse current through the body diode of inter - nal PMOS FET from VOUT to VIN can occur. To limit this reverse current, Cin should be made greater than Cout to sink current from the output. Output Capacitor A uF filter capacitor is added on the VOUT pin to sup - press noise on the evaluation board. If a larger output capacitance value is used, then input inrush current should be considered since the power-on transient is dependent on the output capacitor size. It should also be noted that SC705 has longer turn-on delay time and rise time than SC704 so SC705 will significantly improve input inrush current during power-on application conditions. Board Layout Considerations Input capacitor(C) and output capacitor(C2) should be placed as close to the SC704/SC705 as possible, and all traces should be as short as possible and as wide as pos - sible to minimize the case-to-ambient thermal impedance and parasitic electrical effects. Evaluation Board Information Both T and T2 test points are Kelvin connections which can be used to minimize R O. A jumper can be used between VIN and EN on J to enable the part. To disable the part the jumper can be connected between EN and GND on J.

Outline Drawing — CSP 0.76mm X 0.76mm, 4 Lead

Land Pattern — CSP 0.76mm X 0.76mm, 4 Lead

Power Management Products Division

200 Flynn Road, Camarillo, CA 9302

Phone: (805) 498-2 Fax: (805) 498-3804 www.semtech.com Contact Information SC704/SC705 © Semtech 205 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any conse - quence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellec- tual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified range. SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE- SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF SEMTECH PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney fees which could arise. Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners.