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Toshiba Releases New MOSFET Gate Driver IC that Will Help to Reduce Device Footprints

2022-02-09 | Return

- TCK42xG Series supports back-to-back connection of external N-channel MOSFETs -

KAWASAKI, Japan—Toshiba Electronic Devices & Storage Corporation ("Toshiba") has released “TCK421G” for 20V power lines as the first product in its new “TCK42xG Series” of MOSFET gate driver ICs. Devices in the series are dedicated to gate voltage control of an external N-channel MOSFET, based on input voltage, and have an overvoltage lockout function. Volume shipments start today.

TCK421G is suitable for configuring power multiplexer circuits or load switch circuits equipped with reverse-current blocking, in combination with a back-to-back connection of external N-channel MOSFETs. It incorporates a charge pump circuit that supports a wide range of input voltages, from 2.7V to 28V, and supplies stable voltage to the gate-source voltage of external MOSFETs with its intermittent operation. This allows switching of large currents.

Housed in a WCSP6G[1] package, one of the smallest in the industry[2], TCK421G realizes high density mounting in small devices, such as wearable devices and smartphones, helping to reduce their footprint.

Toshiba will continue to develop the TCK42xG Series and plans to introduce six versions in all. The overvoltage lockout of TCK42xG Series will support an input voltage of 5V to 24V. Two types of gate output voltage, 5.6V and 10V, will be made available, for different gate-source voltages in the external MOSFETs. The overvoltage lockout and gate output voltage can be selected, according to the user’s device.

Notes:
[1] 1.2mm x 0.8mm
[2] Among MOSFET gate driver ICs. Toshiba survey, as of February 2022.

Applications
●Wearables
●Smartphones
●Notebook PCs, tablets
●Storage equipment, etc.

Features of the new series
●Gate-source voltage setting (5.6V, 10V) depending on input voltage with a built-in charge pump circuit
●Overvoltage lockout supports 5V to 24V
●Low input OFF current: IQ(OFF)= 0.5μA (max) @VIN=5V, Ta= -40 to 85°C

Main Specifications

(Unless otherwise specified, Ta=25°C)

Part number			TCK421G
Package	Name		WCSP6G
	Size (mm)		1.2×0.8 (typ.)、
			t=0.35 (max)
Operating	Input voltage V_IN (V)	@T_a= -40 to 85°C	2.7 to 28
ranges
Electrical characteristics	V_IN _UVLO threshold, V_out falling	@T_a= -40 to 85°C for V_{IN_UVLO} max	2.0/2.5
	V_{IN_UVLO} typ./max (V)
	V_{IN UVLO} hysteresis V_{IN_UVhyst}	–	0.2
	typ. (V)
	V_{IN OVLO} threshold, V_out falling	@T_a= -40 to 85°C	22.34/24.05
	V_{IN_OVLO} min/max (V)
	V_{IN OVLO} hysteresis	–	0.12
	V_{IN_OVhyst} typ. (V)
	Input quiescent current	@V_IN=5V	140
	(ON state)^[3]
	I_Q(ON) typ. (μA)	@V_IN=12V	185
	Standby current	@V_IN=5V, T_a= -40 to 85°C	0.5
	(OFF state)
	I_Q(OFF) max (μA)	@V_IN=12V, T_a= -40 to 85°C	0.9
	GATE Drive voltage	@V_IN=2.7V	8/9.2/10
	(V_GATE1-V_IN)	@V_IN=5V	9/10/11
	(V_GATE2-V_IN)	@V_IN=9V	9/10/11
	V_GS min/typ./max	@V_IN=12V	9/10/11
	(V)	@V_IN=20V	9/10/11
	V_GS ON time	@V_IN=5V, C_GATE1,2=4000pF	2.9
	t_ON typ. (ms)
	V_GS OFF time	V_IN=5V, @C_GATE1,2=4000pF	52
	t_OFF typ. (μs)
	OVLO V_GS turn OFF time	@C_GATE1,2=4000pF	34
	t_OVP typ. (μs)

Notes :
[3] Control terminal current (ICT) is not included.

Follow the links below for more on the new product.
●TCK42xG Series

Source: https://www.global.toshiba