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TPS22994
SLVSCL4B – AUGUST 2014 – REVISED SEPTEMBER 2014
TPS22994 Quad Channel Load Switch with GPIO and I2C Control
1 Features
•1 Input Voltage: 1.0 V to 3.6 V • Low ON-State Resistance (VBIAS = 7.2 V)
– RON = 41 mΩ at VIN = 3.3 V – RON = 41 mΩ at VIN = 1.8 V – RON = 41 mΩ at VIN = 1.5 V – RON = 41 mΩ at VIN = 1.0 V • VBIAS voltage range: 2.7 V to 17.2 V – Suitable for 1S/2S/3S/4S Li-ion Battery
Topologies • 1-A Max Continuous Current Per Channel • Quiescent Current
– Single Channel < 12 µA – All Four Channels < 22 µA • Shutdown Current (All Four Channels) < 7 µA • Four 1.2-V Compatible GPIO Control Inputs • I2C Configuration (Per Channel) – On/Off Control – Programmable Slew Rate Control (5 options) – Programmable ON-delay (4 options) – Programmable Output Discharge (4 options) • I2C SwitchALL™ Command for Multichannel/Multi-chip Control • QFN-20 package, 3 mm x 3 mm, 0.75 mm height
2 Applications
• Ultrathin PC
• Notebook PC
• Tablets
• Servers
• All-In-One PC
3 Description
The TPS22994 is a multi-channel, low RON load switch with user programmable features. The device contains four N-channel MOSFETs that can operate over an input voltage range of 1.0 V to 3.6 V. The switch can be controlled by I2C making it ideal for usage with processors that have limited GPIO available. The rise time of the TPS22994 device is internally controlled in order to avoid inrush current. The TPS22994 has five programmable slew rate options, four ON-delay options, and four quick output discharge (QOD) resistance options.
The channels of the device can be controlled via either GPIO or I2C. The default mode of operation is GPIO control through the ONx terminals. The I2C slave address terminals can be tied high or low to assign seven unique device addresses.
The TPS22994 is available in a space-saving RUK package (0.4-mm pitch) and is characterized for operation over the free-air temperature range of –40°C to 85°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS22994
WQFN (20)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.
4 Simplified Schematic
PMIC or PMU
1
VIN1
ON1
VBIAS (2.7 V to 17.2 V)
VOUT1
VIN2
ON2
VIN3
ON3
TPS22994
VOUT2 VOUT3
VIN4
ON4
SDA SCL
VOUT4
ADD1 ADD2 ADD3
VDD µC (1.62 to 3.6)
CL RL CL RL CL RL CL RL
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS22994
SLVSCL4B – AUGUST 2014 – REVISED SEPTEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Simplified Schematic............................................. 1 5 Revision History..................................................... 2 6 Device Comparison Table..................................... 3 7 Pin Configuration and Functions ......................... 4 8 Specifications......................................................... 5
8.1 Recommended Operating Conditions....................... 5 8.2 Absolute Maximum Ratings ..................................... 5 8.3 Handling Ratings....................................................... 5 8.4 Thermal Information .................................................. 6 8.5 Electrical Characteristics........................................... 6 8.6 Switching Characteristics, VBIAS = 7.2 V................... 9 8.7 Switching Characteristics, VBIAS = 3.3 V .................. 9 8.8 Typical Characteristics ............................................ 11
9 Detailed Description ............................................ 18 9.1 Overview ................................................................. 18 9.2 Functional Block Diagram ....................................... 18 9.3 Feature Description................................................. 19 9.4 Device Functional Modes........................................ 24 9.5 Register Map........................................................... 25
10 Applications and Implementation...................... 27 10.1 Application Information.......................................... 27 10.2 Typical Application ................................................ 30
11 Layout................................................................... 35 11.1 Board Layout......................................................... 35
12 Device and Documentation Support ................. 36 12.1 Trademarks ........................................................... 36 12.2 Electrostatic Discharge Caution ............................ 36 12.3 Glossary ..........