Push Button Load Switch

Push Button Load Switch

By adding our Push Button Load Switch between the battery and the main power circuit (which could be an LDO or a DCDC) on the board, or between the battery and the MPU if the MPU is connected directly to the battery without any power circuit, it is possible to completely shut the line from the battery, which in turn stops the battery draining over time.

We call this function “Ship Mode” or “Shutdown Mode” and we estimate that over a period of 6 months in storage, the difference in remaining battery life comparing applications with/without the Load Switch is significant. Our Range of Push Button Load Switches is available in an ultra-small 2.0mm x 2.0mm x 0.33mm USP-8B06 package.

Once the application on which the Load Switch is used has been through final testing following production, the circuit can be put into “Ship Mode” very easily by inputting a single pulse ("H" level) to the Load Switch’s SHDN pin. After several months of storage, a push button signal turns on the switch and the circuit will start-up with a battery that still has enough charge to allow use straight out of the box!

The Load Switch can also be used as a main power switch in place of a mechanical switch. When the power is turned off, usually the MPU should perform an operation to turn off the system safely and securely. After such an operation is completed, the MPU can send a H" level signal to the SHDN pin of the Load Switch to turn off the system. In addition, the XC619xA is equipped with an ON/OFF toggle function that means that the power supply line can be switched on/off by inputting a “L” level signal during a pre-determined time to the SW pin.

 

With a wider Input Voltage range (1.8V~6.0V) and a lower quiescent current (0.13μA) the XC6193 and the XC6194 are now available for a wider range of applications. The XC6193 also has the option for an External FET allowing for a larger output current. 

To avoid inrush current during start up the XC6193 uses the internal switch between VIN and VOUT. Once the voltage has increased to a suitable level, the external MOSFET is turned on. This avoids a large inrush current being drawn from the battery and helps avoid depletion. 

Key Features

SERIES XC6192

NEW!

XC6193

NEW!

XC6194

Input Voltage Range 2.5V ~ 6.0V 1.8V ~ 6.0V 1.8V ~ 6.0V
Stand-by Current 0.01µA (TYP.) / Turn-Off state 0.001µA (TYP.) / Turn-Off state 0.001µA (TYP.) / Turn-Off state
Quiescent Current 0.45µA (TYP.) / Turn-Off state 0.13µA (TYP.) / Turn-Off state 0.13µA (TYP.) / Turn-Off state
Output Current 400mA

Internal FET:

1A (VIN=2V) 

External FET:

dependant on FET

1A (VIN=2V)
Turn-On Delay Time 0.5s, 1.0s, 3.0s or 5s 0.2s, 1.0s, 3.0s or 5s 0.2s, 1.0s, 3.0s or 5s
Turn-Off Delay Time 3s, 5s, 10s or 15s 3s, 5s, 10s or 15s 3s, 5s, 10s or 15s
Turn-Off
Method
Type A "H" voltage to SHDN pin.
"L" voltage during TOFFD
to SW pin.
"H" voltage to SHDN pin.
"L" voltage during TOFFD
to SW pin.
"H" voltage to SHDN pin.
"L" voltage during TOFFD
to SW pin.
Type B "H" voltage to SHDN pin. "H" voltage to SHDN pin. "H" voltage to SHDN pin.
Protection Circuits Inrush current, Short circuit

Inrush current, Short circuit,

Thermal Shutdown

Inrush current, Short circuit,

Thermal Shutdown

Other Functions Power Good Pin Power Good Pin Power Good Pin
Forced shutdown pin Forced shutdown pin Forced shutdown pin
Output capacitor discharge Output capacitor discharge Output capacitor discharge
Op. Amb. Temperature -40℃ ~ +85℃
Package USP-8B06