DUAL LOW DROPOUT VOLTAGE REGULATOR
Description
TK740xxL
DUAL LOW DROPOUT VOLTAGE REGULATOR
FEATURES
n 2 Channel LDO in one Package n Outputs can be set by External Resistors n High Precision Output Voltage (± 2.
0 % or ± 60 mV) n Independent Active High On/Off Control for each LDO n Very Low Dropout Voltage (VDROPA = 90 mV at 100 mA,
VDROPB = 80 mV at 50 mA)
n StablewithCeramicCapacitors n Excellent Ripple Rejection Ratio (84 dB @ 400 Hz) n 1 µA at Shutdown n Peak Output Current is 370 mA n SOT23L-8 Package n Wide Operating Voltage Range (1.
8 V ~ 14.
5 V) n ReverseBiasandOvercurrentProtection n Built-in Thermal Shutdown
DESCRIPTION
The TK740xx is a Dual Ultra Low-Drop-Out regulator with a built-in electronic switch.
The A-Side delivers up to 200 mA output current and the B-Side delivers up to 120 mA output current over the full temperature range.
The internal switch can be controlled by TTL or CMOS logic levels.
The device is in the “on” state when the control pin is pulled to a logic high level.
External capacitors can be connected between the FBA and VOUTA and FBB and VOUTB pins to lower the output noise level.
Internal PNP pass transistors are used to achieve a low dropout voltage of 90 mV (typ.
) at 100 mA load current side A and 80 mV (typ.
) at 50 mA load current side B.
The TK740xx has very low quiescent current.
45 µA at no load and 0.
4 mA with a 50 mA load.
The internal thermal shut down circuitry limits the junction temperature to 150 °C.
The
ORDERING INFORMATION
TK740 CL-
Package Code Temp.
Code
B Side Voltage Code A Side Voltage Code Tape/Reel Code
VOLTAGE CODES:
Refer to Table 1
PACKAGE CODE:
S: SOT23L-8
TAPE/REEL CODE:
L: Tape Left Reel Size = 1300 pcs.
TEMP.
CODE:
C: -30 to 80°C I: -40 to 85°C
APPLICATIONS
n Battery Powered Systems n Measurement Systems n Mobile Communications Systems n Cellular Phones n Cordless Phones n PDAs n Toy Motor Drivers
load current is internally monitored and the device will shut down in the presence of a short circuit or overcurrent condition at the output.
The TK...
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