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Load Switch ICs

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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

これは、WCSP4Dパッケージの写真です。

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

これは、WCSP6Cパッケージの写真です。

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

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 from 1.1 V 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 relatively light loads. The TCK106AG, TCK107AG and TCK108AG in the ultra-small WCSP4D package consume only 0.23 μA (max) during active operation (max). (VIN = 5.5 V, IOUT = 0 mA, Ta = -40 to 85°C)
img_load-switch03

Typical Current Consumption Curves for the TCK106/107G/108G

Load switches with overcurrent protection
TCK22946G, TCK22951G, TCK2065G,
TCK1024G, TCK22891G, TCK22892G,
TCK22893G, TCK22894G
Eight load switch ICs with various protection features including overcurrent protection These load switch ICs provide overtemperature protection and inrush current limiting, as well as overcurrent protection of 400 mA to 1540 mA Some load switch ICs also provide current reversal protection and undervoltage lockout. They not only provide protection against load short-circuit conditions but also support various failsafe functions.
file

Overcurrent protection

TCK2292xG and TCK2297xG series
Toshiba has released nine load switch ICs with different output rise times. You can select a load switch IC that best meets your requirement.
This helps reduce system power consumption and size, improve sequence control and suppress inrush current.
img_load-switch05

Inrush current can be reduced by selecting a slew rate (fixed) suitable for the load.

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.

これは、TCK101G,TCK102Gのオン抵抗特性を示したグラフです。
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.

これは、TCK101G,TCK102Gのオン抵抗特性を示したグラフです。
Typical On-Resistance Curves for the TCK206G/207G/208G

TCK32xG Series
The TCK32xG Series provides the maximum input voltage of 36 V, and various protection features including overvoltage lockout (OVLO) protection and reverse-current protection. Additionally, the TCK32xG Series allows independent control of two power supply inputs.

Application Examples

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

Packages and Pin Assignments

Package WCSP4C WCSP4D WCSP6C WCSP6E WCSP9 WCSP16C SMV
(SOT-25)
Size (mm) 0.9 × 0.9
t: 0.5
0.79 × 0.79
t: 0.5
1.0 × 1.5
t: 0.5
0.8 × 1.2
t: 0.6
1.5 × 1.5
t: 0.5
1.9 × 1.9
t: 0.5
2.8 × 2.9
t: 1.1
Pin Pitch (mm) 0.5 0.4 0.5 0.4 0.5 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
WCSP4D
TCK106AG 1.0 A 6.0 V 1.1 ~ 5.5 V
-
-
-
-
Pull-down
(Active-High)
TCK107AG 1.0 A
-
-
-
TCK108AG 1.0 A
-
-
-
Open
(Active-Low)
SMV
(SOT-25)
TCK106AF 1.0 A 6.0 V 1.1 ~ 5.5 V
-
-
-
-
Pull-down
(Active-High)
TCK107AF 1.0 A
-
-
-
TCK108AF 1.0 A
-
-
-
Open
(Active-Low)
WCSP6C
TCK111G 3.0 A 6.0 V 1.1 to 5.5 V True Reverse Current Blocking - - Pull-down
(Active-High)
TCK112G 3.0 A True Reverse Current Blocking -
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)
WCSP6E
TCK22946G 0.4 A 6.0 V 1.1 ~ 5.5 V
True Reverse Current Blocking
400mA
Pull-down
(Active-High)
TCK22951G 0.74 A
True Reverse Current Blocking
740mA
TCK2065G 1.11 A 1.4 ~ 5.5 V
True Reverse Current Blocking
1110mA
TCK1024G 1.54 A
True Reverse Current Blocking
1540mA
TCK22891G 0.4 A
-
400mA
TCK22892G 0.74 A
-

740mA

TCK22893G 1.11 A
-
1110mA
TCK22894G 1.54 A
-
1540mA
TCK22921G 2.0 A 6.0 V 1.1 ~ 5.5 V
-
-
Pull-down
(Active-High)
TCK22922G 2.0 A
-
-
TCK22923G 2.0 A
-
-
TCK22925G 2.0 A
-
-
TCK22971G 2.0 A
-
-
-
TCK22972G 2.0 A
-
-
-
TCK22973G 2.0 A
-
-
-
TCK22974G 2.0 A
-
-
-
TCK22975G 2.0 A
-
-
-
Open
(Active-Low)
TCK22910G 2.0 A 6.0 V 1.1 ~ 5.5 V
True Reverse Current Blocking
-
-
Open
(Active-Low)
TCK22911G 2.0 A
True Reverse Current Blocking
-
TCK22912G 2.0 A
True Reverse Current Blocking
-
-
Pull-down
(Active-High)
TCK22913G 2.0 A
True Reverse Current Blocking
-
WCSP9
TCK301G 3.0 A 30V 2.3 ~ 28V
-
-
Pull-down
(Active-Low)
TCK302G 3.0 A
-
-
TCK303G 3.0 A
-
-
TCK304G 3.0 A
-
-
Pull-down
(Active-High)
TCK305G 3.0 A
-
-
Pull-down
(Active-Low)
WCSP16C


 
TCK321G 2.0 A 40 V 2.9 ~ 36V - - Pull-down (Active-Low)
TCK322G 2.0 A - -
TCK323G 2.0 A - -

Application Note for Load Switch ICs.

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