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Load Switch ICs

A load switch IC is a power supply IC fabricated using a CMOS process that contains an output transistor and an output driver. The IC versions of load switches provide a solution footprint much smaller than those composed of discrete components. Moreover, load switch ICs feature low-voltage operation, low on-resistance and low current consumption and provides additional functions. House in ultra-small packages measuring less than 1 mm2, Toshiba's load switch ICs are ideal for space-critical portable applications.

Features

1. Ultra-small packages
Saves board space due to the use of WCSP packages

2. Low on-resistance
Available in many variants with low on-resistance, including those with low on-resistance of less than 10 mΩ, due to the use of small-geometry process and voltage-boosting technology

3. Rich functions
Incorporates various functions such as inrush current limiting, reverse-current protection, overcurrent protection, thermal shutdown and automatic output discharge that are complicated to build with discrete components

4. Wide operating voltage range
The ultra-low-voltage series operates at 0.75 V while the general-purpose series operates at 1.1 to 5.5 V.

5. Product performance guarantee
Standardized on-resistance, leakage and other temperature characteristics that are difficult to achieve with discrete MOSFETs

This is a photo of the WCSP4C

This is a photo of the WCSP6C

Space-Saving Packages and Rich Functions

Load switch ICs feature low-voltage operation and low on-resistance and provide additional functions. (Inrush current limiting, automatic output discharge, reverse-current protection, thermal shutdown, etc.)

Discrete devices necessary to create a load switch

Circuit Composed of Discrete Components/Circuit Using a Load Switch IC

Features of the TCK Series

TCK10xG Series
The TCK10xG Series features a wide operating voltage range of 1.1 to 5.5 V and low current consumption. It is available with a maximum output current of up to 1 A and ideal for applications requiring power saving at light loads.
The TCK106G, TCK107G and TCK108G consume only 0.2 μA (max) during active operation (VIN = 5.5 V, IOUT = 0 mA, Ta = -40 to 85°C).
Load switch ICs with reverse-current protection are also available.

This is a graph showing the Typical Current Consumption Curves for the TCK106/107G/108G
Typical Current Consumption Curves for the TCK106/107G/108G

TCK11xG Series
The TCK11xG Series features a wide operating voltage range of 1.1 to 5.5 V and ultra-low on-resistance. The TCK11xG Series provides an on-resistance of approximately 8 mΩ, despite its small size and incorporates reverse-current protection and thermal shutdown. It can be used for diverse applications such as driver switches for the battery line and low-voltage switches rated at 1 A or higher.

This is a graph showing the Typical On-Resistance Curves for the TCK111G/112G
Typical On-Resistance Curves for the TCK111G/112G

TCK20xG Series
The TCK20xG Series features ultra-low-voltage operation as low as 0.75 V and low on-resistance. It also provides an on-resistance of approximately 18 mΩ despite using the ultra-small WCSP4C package and incorporates reverse-current protection. Those housed in the general-purpose SMV (SOT-25) package are under development.

This is a graph showing the Typical On-Resistance Curves for the TCK206G/207G/208G
Typical On-Resistance Curves for the TCK206G/207G/208G

Application Examples

  • Cell phones
  • Digital still cameras (DSCs)
  • Small portable devices
  • Portable audio players
  • Tablet PCs

Packages and Pin Assignments

Package WCSP4 WCSP4C WCSP6B WCSP6C SMV
(SOT-25)
Size (mm) 0.79 × 0.79
t: 0.5
0.9 × 0.9
t: 0.5
0.8 × 1.2
t: 0.6
1.0 × 1.5
t: 0.5
2.8 × 2.9
t: 1.1
Pin Pitch (mm) 0.4 0.5 0.4 0.5 0.95
Pin Configuration
(top view)
A1: VOUT
B1: GND
A2: VIN
B2: CONTROL
A1: VOUT
B1: GND
A2: VIN
B2: CONTROL
A1: VOUT
B1: VOUT
C1: GND
A2: VIN
B2: VIN
C2: CONTROL
A1: VOUT
B1: VOUT
C1: GND
A2: VIN
B2: VIN
C2: CONTROL
1: VOUT
2: GND
3: CONTROL
4: NC
5: VIN

Product Lineup

Load Switch ICs: TCK Series
Package Part Number Abs. Max Ratings Operating
Voltage
Range
Features
DC Output Current Input Voltage Inrush Current Reduction Reverse-Current Protection Thermal Shutdown Overcurrent Protection Auto Discharge Control Pin Connection
WCSP6B
TCK101G 1.0 A 6.0 V 1.1 to 5.5 V - - Pull-down (Active-High)
TCK102G 1.0 A - - -
TCK104G 0.5 A -
TCK105G 0.8 A -
WCSP4
TCK106G 1.0 A 6.0 V 1.1 to 5.5 V - - - -
TCK107G 1.0 A - - -
TCK108G 1.0 A - - - Open (Active-Low)
WCSP6C
TCK111G 3.0 A 6.0 V 1.1 to 5.5 V - - Pull-down (Active-High)
TCK112G 3.0 A -
SMV
(SOT-25)
TCK126F
(Under development)
2.0 A 6.0 V 1.8 to 5.5 V - - - Pull-down (Active-High)
TCK127F
(Under development)
2.0 A - -
TCK128F
(Under development)
2.0 A - - Open (Active-Low)
WCSP4C
TCK206G 2.0 A 4.0 V 0.75 to 3.6 V - - - Pull-down (Active-High)
TCK207G 2.0 A - -
TCK208G 2.0 A - - Open (Active-Low)
SMV
(SOT-25)
TCK206F
(Under development)
2.0 A 4.0 V 0.75 to 3.6 V - - - Pull-down (Active-High)
TCK207F
(Under development)
2.0 A - -
TCK208F
(Under development)
2.0 A - - Open (Active-Low)

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