TPS22917DBVR集成电路（IC）的配电开关负载驱动器规格书PDF中文资料

1 Features

• Input operating voltage range (VIN): 1 V to 5.5 V

• Maximum continuous current (IMAX): 2 A

• On-resistance (RON):

– 5 VIN = 80 mΩ (typical)

– 1.8 VIN = 120 mΩ (typical)

– 1 VIN = 220 mΩ (typical)

• Ultra-low power consumption:

– ON state (IQ): 0.5 μA (typical)

– OFF state (ISD): 10 nA (typical)

• Smart ON pin pulldown (RPD):

– ON ≥ VIH (ION): 10 nA (maximum)

– ON ≤ VIL (RPD): 750 kΩ (typical)

• Adjustable turn ON limits inrush current (tON):

– 5-V tON = 100 μs at 72 mV/μs (CT = open)

– 5-V tON = 4000 μs at 2.3 mV/μs (CT = 1000 pF)

• Adjustable output discharge and fall time:

– Optional QOD resistance ≥ 150 Ω (internal)

• Always-ON true Reverse Current Blocking (RCB):

– Activation current (IRCB): –500 mA (typical)

– Reverse leakage (IIN,RCB): –1 μA (maximum)

2 Applications

• Industrial systems

• Set top box

• Blood glucose meters

• Electronic point of sale

3 Description

The TPS22917x device is a small, single channel load

switch using a low leakage P-Channel MOSFET for

minimum power loss. Advanced gate control design

supports operating voltages as low as 1 V with

minimal increase in ON-Resistance and power loss.

The Rise and Fall times can be independently

adjusted with external components for system level

optimizations. The timing capacitor (CT) and turn

on time can be adjusted to manage inrush current

without adding unnecessary system delays. The

output discharge resistance (QOD) can be used to

adjust the output fall time. Connect the QOD pin

directly to the output for a fastest fall time or leave

it open for the slowest fall time.

The switch ON state is controlled by a digital input

that can interface directly with low-voltage control

signals. The TPS22917 uses active high enable logic,

while the TPS22917L uses active low. When power is

first applied, a Smart Pulldown is used to keep the ON

pin from floating until system sequencing is complete.

After the ON pin is deliberately driven high (≥VIH),

the Smart Pulldown (RPD) is disconnected to prevent

unnecessary power loss.

The TPS22917x device is available in a leaded

SOT-23 package (DBV) which allows visual inspection

of solder joints. The device is characterized for

operation over a temperature range of –40°C to

125°C.