Document
POWER MANAGEMENT
Features
Input Voltage Range – 1.1V to 3.6V 2A Continuous Output Current Ultra-Low Ron – 36mΩ Automatic Output Discharge Circuit
Fast Turn-on Option With No Output Discharge Circuit – SC724
Extended Soft Start Option With Automatic Output Discharge Circuit – SC725
Low Quiescent Current – 0.81µA(Typ.) Low Shutdown Current < 1µA – SC724 1.1V Logic Level Enable Compatible With CMOS/GPIO
Control Hardened ESD Protection 3kV Package: CSP – 0.76mm × 0.76mm, 0.4mm Pitch
SC724/SC725
2A Low Vin, Very Low Ron Load Switch
Description
The SC724/SC725 is a low input voltage, very low Ron load switch designed for use in battery powered applications. Very low quiescent current of less than 2µA, and a low shutdown current of less than 1µA (SC724) reduces power loss during Standby and Off states. A logic level Enable allows low voltage on/off control down to 1.1V.
The SC724 provides a quick turn on time, while the SC725 provides a longer soft start to limit inrush current. The SC725 also features an automatic discharge circuit which discharges the output when the part is disabled.
The SC724/SC725 is offered in an ultra-small 4-bump 0.76mm × 0.76mm Chip Scale Package (CSP) which enables very small board area implementations. The SC724/SC725 has an operating ambient temperature range of -40°C to +85°C.
Applications
Smart Phones Tablet PCs GPS Devices Battery Powered Equipment Other Portable Device
SC724/SC725 offers an alternative bump connection pattern to SC724/SC725. Please go to Semtech.com website for details.
Device
Package
Automatic Discharge
Rising Time
SC724
CSP
No 3µs(Typ.)
SC725
CSP
Yes 140µs(Typ.)
Typical Application Circuit
SUPPLY
1µF
ENABLE
VIN VOUT
SC724 / SC725
EN GND
LOAD
1µF
Rev. 2.0
© 2014 Semtech Corporation
Pin Configuration
TO P VIEW (BUMPS ON THE BOTTOM )
A1 A2 B1 B2
CSP 0.76x0.76, 4 Bump
SC724/SC725
Ordering Information
Device SC724CSTRT SC725CSTRT
Package CSP 0.76mm×0.76mm 4-bump CSP 0.76mm×0.76mm 4-bump
SC724EVB
Evaluation Board
SC725EVB
Evaluation Board
Notes: (1) 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.
Pin Descriptions
Pin # A1 B1 A2 B2
Pin Name
VIN EN VOUT GND
Pin Function
Input Voltage. Enable input. A 5.0MΩ internal resistor is connected from this pin to GND. Drive HIGH to turn on the switch; drive LOW to turn off the switch. When the EN pin is floated, the switch is OFF. Output Voltage. Ground.
Marking Information(SC724)
SC724/SC725
Marking Information(SC725)
Marking for the 0.76 x 0.76 mm CSP 4 Lead Package : O = Pin 1 ID nn = Part No. Code (Example: AR) - Reference Part No.
Marking for the 0.76 x 0.76 mm CSP 4 Lead Package : O = Pin 1 ID nn = Part No. Code (Example: AT) - Reference Part No.
SC724/SC725
Absolute Maximum Ratings
VIN to GND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +4.3 EN to GND (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +4.3 OUT to GND (V) . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 to +VVIN ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Recommended Operating Conditions
Ambient Temperature Range (°C). . . . . . . . . -40 < TA < +85 VVIN (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 to 3.6 Maximum Output Current (A). . . . . . . . . . . . . . . . . . . . . . . . . 2
Thermal Information
Thermal Resistance, Junction to Ambient(2) (°C/W) . . . 160 Maximum Junction Temperature (°C). . . . . . . . . . . . . . . +125 Storage Temperature Range (°C). . . . . . . . . . . . . -65 to +150 Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . . +260
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: (1) Tested according to JEDEC standard JS-001-2012. (2) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Electrical Characteristics
Unless noted otherwise, TA = 25°C for typical, -40°C < TA = TJ < 85°C for min and max. VVIN = 1.8V, CIN = 1μF, COUT = 1μF, VEN = VVIN.
Parameter
Symbol
Conditions
Min Typ Max
On Resistance (Ron)
Quiescent Current (1) Enable
VVIN =3.6V, IOUT = 200mA, V�EN =1.5V VVIN =2.5V, IOUT = 200mA, V�EN =1.5V RON VVIN =1.8V, IOUT = 200mA, V�EN =1.5V VVIN =1.5V, IOUT = 200mA, V�EN =1.5V VVIN =1.2V, IOUT = 200mA, V�EN =1.0V IQ VVIN = VEN = 3.6V, VOUT = open
24 29 36 47 43 57 0.81 2
EN Input High Threshold EN Input Low Threshold EN Input Pull-Down Resistance SC724
VEN-IH VEN-IL REN
1.1 0.3
5.0
Shutdown Current
VEN =0V, VOUT = open ISD
VEN =0V, VOUT = open, TA = 25°�C�
1 0.2
Units mΩ mΩ mΩ mΩ mΩ µA
V V MΩ
µA µA
SC724/SC725
Electrical Character.