TK74013 반도체 회로 부품 판매점
DUAL LOW DROPOUT VOLTAGE REGULATOR
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 TOKO |
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 TK740xx circuit features very high stability. An output
capacitor of 0.22 mF provides stable operation for VOUT ³ 2.0
V. Any type of capacitor can be used; however, the larger
this capacitor is, the better the overall characteristics are.
The ripple rejection ratio is 84 dB at 400 Hz, and 80 dB at
1 kHz.
The TK740xx is available in the SOT23L-8 surface mount
package.
TK740xxL
FBA
VOUTA
VOUTB
FBB
8 ON/OFF CONTROL A
VIN
GND
ON/OFF CONTROL B
VOUT A
FBA
BLOCK DIAGRAM
VIN
BANDGAP
REFERENCE
GND
ON / OFF
CONTROL
AB
RIN = 300 kΩ
THERMAL &
OVER CURRENT
PROTECTION
BANDGAP
REFERENCE
GND
VOUT B
FBB
January 22, 2002 TOKO, Inc.
Page 1
TK740xxL
ABSOLUTE MAXIMUM RATINGS - C RANK
Supply Voltage ............................................... -0.4 to16 V Operating Temperature Range ..................... -30 to +80 °C
Power Dissipation .............................................. 600 mW Noise Bypass Pin Voltage .............................. -0.4 to 5 V
Reverse Bias Voltage ................................... -0.4 to 10 V
Operating Voltage Range ............................ 1.8 to 14.5 V
Control Pin Voltage ...................................... -0.4 to VOP V
Short Circuit Current (A Side) .............................. 430 mA
Storage Temperature Range ..................... -55 to +150 °C Short Circuit Current (B Side) .............................. 330 mA
TK740xx ELECTRICAL CHARACTERISTICS - C RANK
Test conditions: TA = 25 °C, VIN = VOUT(TYP) + 1 V, IOUT = 1 mA
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
VOUT Output Voltage
IOUT = 5 mA
Line Reg Line Regulation
D V = 5 V (VIN = VOUT(TYP) + 1V to VOUT(TYP) + 6 V)
IOUT = 5 mA VIN = 18 V
I
Quiescent Current
I = 0 mA Excluding I
Q OUT CONT
ISTBY Standby Current
VCC = 10 V OFF Mode
VFB Feedback Term. Voltage
DVOUT/DTA Temperature Coefficient IOUT = 5 mA
CONTROL TERMINAL SPECIFICATION (Note 3)
ICONT
VCONT
Control Current
Control Voltage
VOUT = 1.8 V, ON Mode
Output ON
Output OFF
See Table 1
0.0 5.0 mV
45 75
mA
0.0 0.1 mA
1.11 1.19 1.29 V
70 ppm / °C
1.8 5
1.8
0.8
mA
V
V
Load Reg Load Regulation (Note 1)
VDROP
Dropout Voltage
IOUT(MAX)
Maximum Output Current
Load Reg Load Regulation (Note 1)
VDROP
IOUT(MAX)
Dropout Voltage
Maximum Output Current
IOUT = 5 mA to 100 mA
IOUT = 5 mA to 200 mA
IOUT = 100 mA
IOUT = 150 mA
IOUT = 200 mA
VOUT = VOUT(TYP) x 0.9 (Note 2)
IOUT = 5 mA to 100 mA
IOUT = 50 mA
IOUT = 100 mA
VOUT = VOUT(TYP) x 0.9
(Note 2)
14 30
33 37
90 150
125 180
160 250
290 380
17 40
80 125
135 220
190 280
mV
mV
mV
mV
mV
mA
mV
mV
mV
mA
Page 2
January 22, 2002 TOKO, Inc.
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TK74013 regulator
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