TK732xx
LOW DROPOUT REGULATOR
FEATURES
s
Up to 5 A Output Current Capability With External
PNP Transistor
s
Internal Short Circuit Protection
s
Excellent Load Regulation
s
CMOS/TTL-Compatible On/Off Switch
s
Internal Reverse Bias Current Protection Switch
s
Internal Thermal Shutdown
s
Broad Operating Voltage Range
s
High Impedance V
SENSE
Pin (Off Mode)
s
Continuous and Pulsed Current Modes
APPLICATIONS
s
Battery Powered Systems
s
Cellular/Cordless Telephones
s
Radio Control Systems
s
Wireless Communications Systems
s
Portable Instrumentations
s
Portable Computers
s
Personal Digital Assistants
s
Local Area Network (LAN) Receivers
s
Lithium Ion Battery Chargers
s
Power Recovery for Microprocessors
DESCRIPTION
The TK732xx is a controller IC for a low dropout voltage
regulator. The TK732xx and the external PNP power
transistor provide standard output voltages from 2 to 11 V
and output current from 100 mA to 5 A. By utilizing an
external PNP power transistor, low dropout voltage at high
current can be readily achieved. The internal electronic
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 high logic level. A pin for a bypass capacitor, which
connects to the internal circuitry, is provided to lower the
overall output noise level.
The current limit characteristics can be configured as
continuous (constant current) or pulsed (cycling). An internal
thermal shutdown circuit limits the junction temperatures
to below 150
°C.
In the “off” mode, the output of the
regulator becomes a high impedance. This prevents the
output capacitor from being rapidly discharged for backup
to the load.
TK732xx
CONTROL
NOISE
BYPASS
01S
BASE
VSENSE
GND
CPULSE
VIN
IPK
BLOCK DIAGRAM
VIN
IPK
CPULSE
BASE
VSENSE
ORDERING INFORMATION
TK732
Voltage Code
Package Code
VOLTAGE CODE
20 = 2.0 V *
21 = 2.1 V *
22 = 2.2 V *
23 = 2.3 V *
24 = 2.4 V
25 = 2.5 V
26 = 2.6 V
27 = 2.7 V
28 = 2.8 V
29 = 2.9 V
30 = 3.0 V
31 = 3.1 V
32 = 3.2 V
33 = 3.3 V
34 = 3.4 V
35 = 3.5 V
36 = 3.6 V
37 = 3.7 V
38 = 3.8 V
39 = 3.9 V
40 = 4.0 V
41 = 4.1 V
42 = 4.2 V
43 = 4.3 V
M L
Grade
Tape/Reel Code
Temp. Code
TAPE/REEL CODE PACKAGE CODE
ON/OFF
CIRCUIT
THERMAL
SENSOR
CONTROL
M: SOT-23L-8
44 = 4.4 V
L: Tape Left
45 = 4.5 V
46 = 4.6 V
GRADE
TEMP. RANGE
47 = 4.7 V
None: Standard 2%
C: -30 to 80 C **
48 = 4.8 V
I : -40 to 85 C
H: High (Special) **
*
49 = 4.9 V
50 = 5.0 V
55 = 5.5 V *
* Unavailable with I Rank
Specified
70 = 7.0 V *
** unless Otherwise TK73242MCLH Available Only
*** TK73241MCLH,
80 = 8.0 V
11 = 11.0 V
BANDGAP
REFERENCE
LEAKAGE
PROTECTION
GND
NOISE BYPASS
January 1999 TOKO, Inc.
Page 1
TK732xx
ABSOLUTE MAXIMUM RATINGS (STANDARD DEVICES) (NOTE 6)
Supply Voltage Range ............................................ 19 V
Power Dissipation (Note 1) ................................ 600 mW
Reverse Bias Voltage Range ..................................... 6 V
Noise Bypass Pin Terminal Voltage Range ............... 5 V
Control Pin Terminal Voltage Range ........................ 14 V
Storage Temperature Range ................... -55 to +150
°C
Operating Temperature Range ...................-30 to +80
°C
Extended Temperature Range ................... -40 to +85
°C
Operating Voltage Range ............................ 1.8 to 14.0 V
Junction Temperature ........................................... 150
°C
Lead Soldering Temperature (10 s) ...................... 235
°C
TK732xx ELECTRICAL CHARACTERISTICS (STANDARD DEVICES)
Test conditions: V
IN
= V
OUT(TYP)
+ 1 V, T
A
= 25
°C,
unless otherwise specified.
SYMBOL
I
Q
I
STBY
I
R(LEAK)
I
OUT
V
OUT
V
DROP
Line Reg
Load reg
I
BASE(L)
I
BASE(H)
V
SENSE
PARAMETER
Quiescent Current
Standby Current
Reverse Bias Leakage (Note 5)
Output Current
Output Voltage
Dropout Voltage
Line Regulation
Load Regulation
Base Current LOW
Base Current HIGH
Current Limit Detect Voltage
Pulse Current Limit Mode
f = 400 Hz, C
L
= 10 µF,
C
N
= 0.1 µF, V
IN
= V
OUT(TYP)
= 1.5 V,
I
OUT
= 30 mA, V
RIPPLE
= 100 mVrms,
(Note 3)
f = 1 kHz, BPF = 400 Hz to 30 kHz,
(Note 3)
(Note 4)
15
70
90
110
mV
TEST CONDITIONS
I
OUT
= 0 mA, Excluding I
CONT
V
IN
= 8 V, Output OFF
V
R
= 5 V, Excluding External
Transistor, Output OFF
External Transistor Dependent
I
OUT
= 30 mA, See Table 1
External Transistor Dependent
V
IN
= V
OUT(TYP)
+ 1 V to
V
OUT(TYP)
+ 6 V (Note 2)
External Transistor Dependent
1.8 V
≤
V
IN
≤
4 V
4.1 V
≤
V
IN
≤
12 V
Continuous Current Limit Mode
15
40
80
100
120
N/A
3.0
10
20
2
N/A
MIN
TYP
250
MAX
360
0.1
50
UNITS
µA
µA
nA
A
V
V
mV
mV
mA
mA
mV
RR
Ripple Rejection
57
dB
V
NO
I
PULSE
Output Noise
C
PULSE
Pin Terminal Current
0.13
25
20
1.25
45
µV/ Hz
µA
ppm/° C
V
∆V
OUT
/∆T Temperature Coefficient
V
ref
Reference Voltage
CONTROL TERMINAL SPECIFICATIONS
I
CONT
V
CONT(ON)
V
CONT(OFF)
Page 2
Control Current
Control Voltage (ON)
Control Voltage (OFF)
V
CONT
= 1.8 V, Output ON
Output ON
Output OFF
1.8
0. 6
6.5
20
µA
V
V
January 1999 TOKO, Inc.
TK732xx
TK732xx ELECTRICAL CHARACTERISTICS (STANDARD DEVICES) CONT.
Note 1: Power dissipation is 600 mW when mounted as recommended. Derate at 4.8 mW/°C for operation above 25
°C.
Note 2: Refer to :Definition of Terms.”
Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used.
Note 4: This pin is used for Pulse Current Limit Mode. When selecting Continuous Current Limit Mode, this pin is connected to GND.
Note 5: Not applicable for V
OUT
> 4.8 V.
Note 6: The voltage applied to any pin must be greater than -0.4 V.
Gen. Note: Parameters with min. or max. values are 100% tested at T
A
= 25
°C.
TK732xx ELECTRICAL CHARACTERISTICS TABLE 1 (STANDARD DEVICES)
Test Conditions: V
IN
= V
OUT(TYP)
+ 1 V, I
OUT
= 30 mA, T
A
= 25
°C,
unless otherwise specified.
Room Temp. Range (T
A
= 25
°C)
Output Voltage
2.0 V
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.5 V
7.0 V
6.0 V
11.0 V
Voltage Code
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
55
70
80
11
V
OUT(MIN)
1.940 V
2.040 V
2.140 V
2.240 V
2.340 V
2.440 V
2.540 V
2.640 V
2.740 V
2.840 V
2.940 V
3.040 V
3.140 V
3.240 V
3.335 V
3.435 V
3.535 V
3.630 V
3.725 V
3.825 V
3.920 V
4.020 V
4.120 V
4.215 V
4.315 V
4.410 V
4.510 V
4.605 V
4.705 V
4.800 V
4.900 V
5.390 V
6.860 V
7.840 V
10.78 V
V
OUT(MAX)
2.060 V
2.160 V
2.260 V
2.360 V
2.460 V
2.560 V
2.660 V
2.760 V
2.860 V
2.960 V
3.060 V
3.160 V
3.260 V
3.360 V
3.465 V
3.565 V
3.665 V
3.770 V
3.875 V
3.975 V
4.080 V
4.180 V
4.280 V
4.385 V
4.485 V
4.590 V
4.690 V
4.795 V
4.895 V
5.000 V
5.100 V
5.610 V
7.140 V
8.160 V
11.22 V
Full Temp. Range (T
A
= -40 to +85
°C)
(Applies to "I" Rank Only)
V
OUT(MIN)
V
OUT(MAX)
2.300 V
2.400 V
2.500 V
2.600 V
2.700 V
2.800 V
2.900 V
3.000 V
3.095 V
3.190 V
3.290 V
3.385 V
3.485 V
3.580 V
3.675 V
3.770 V
3.870 V
3.965 V
4.060 V
4.160 V
4.255 V
4.350 V
4.450 V
4.545 V
4.640 V
4.740 V
4.835 V
2.500 V
2.600 V
2.700 V
2.800 V
2.900 V
3.000 V
3.100 V
3.200 V
3.305 V
3.410 V
3.510 V
3.615 V
3.720 V
3.820 V
3.925 V
4.030 V
4.130 V
4.235 V
4.335 V
4.440 V
4.545 V
4.645 V
4.750 V
4.850 V
4.955 V
5.060 V
5.165 V
7.745 V
10.650 V
8.265 V
11.365 V
January 1999 TOKO, Inc.
Page 3
TK732xx
ABSOLUTE MAXIMUM RATINGS (SPECIAL DEVICES) (Note 6)
Supply Voltage Range ............................................ 19 V
Power Dissipation (Note 1) ................................ 600 mW
Reverse Bias Voltage Range ..................................... 6 V
Noise Bypass Pin Terminal Voltage Range ............... 5 V
Control Pin Terminal Voltage Range ........................ 14 V
Storage Temperature Range ................... -55 to +150
°C
Operating Temperature Range ...................-10 to +60
°C
Operating Voltage Range ............................ 1.8 to 14.5 V
Junction Temperature ........................................... 150
°C
Lead Soldering Temperature (10 s) ...................... 235
°C
TK73241MCLH, TK73242MCLH ELECTRICAL CHARACTERISTICS
Test conditions: V
IN
= V
OUT(TYP)
+ 1 V, T
A
= 25
°C,
unless otherwise specified.
SYMBOL
I
Q
I
STBY
I
R(LEAK)
I
OUT
V
OUT
V
DROP
Line Reg
Load reg
I
BASE
V
SENSE
PARAMETER
Quiescent Current
Standby Current
Reverse Bias Leakage (Note 5)
Output Current
Output Voltage
Dropout Voltage
Line Regulation
Load Regulation
Base Current
Continuous Current Limit Mode
Current Limit Detect Voltage
Pulse Current Limit Mode
f = 400 Hz, C
L
= 10 µF,
C
N
= 0.1 µF, V
IN
= V
OUT(TYP)
= 1.5 V,
I
OUT
= 30 mA, V
RIPPLE
= 100 mVrms,
(Note 3)
f = 1 kHz, BPF = 400 Hz to 30 kHz,
(Note 3)
(Note 4)
15
75
90
10 5
mV
TEST CONDITIONS
I
OUT
= 0 mA, Excluding I
CONT
V
IN
= 8 V, Output OFF
V
R
= 5 V, Excluding External
Transistor, Output OFF
External Transistor Dependent
I
OUT
= 30 mA, See Table 2
External Transistor Dependent
V
IN
= V
OUT(TYP)
+ 1 V to
V
OUT(TYP)
+ 6 V (Note 2)
External Transistor Dependent
50
85
100
115
N/A
3.0
10
20
2
N/A
MIN
TYP
240
MAX
300
0.1
50
UNITS
µA
µA
nA
A
V
V
mV
mV
mA
mV
RR
Ripple Rejection
57
dB
V
NO
I
PULSE
Output Noise
C
PULSE
Pin Terminal Current
0.13
25
20
1.25
45
µV/ Hz
µA
ppm/° C
V
∆V
OUT
/∆T Temperature Coefficient
V
ref
Reference Voltage
CONTROL TERMINAL SPECIFICATIONS
I
CONT
V
CONT(ON)
V
CONT(OFF)
Control Current
Control Voltage (ON)
Control Voltage (OFF)
V
CONT
= 1.8 V, Output ON
Output ON
Output OFF
1.8
0.6
6.5
20
A
V
V
Page 4
January 1999 TOKO, Inc.
TK732xx
TK73241MCLH, TK73242MCLH ELECTRICAL CHARACTERISTICS CONT.
Note 1: Power dissipation is 600 mW when mounted as recommended. Derate at 4.8 mW/°C for operation above 25
°C.
Note 2: Refer to “Definition of Terms.”
Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used.
Note 4: This pin is used for Pulse Current Limit Mode. When selecting Continuous Current Limit Mode, this pin is connected to GND.
Note 5: Not applicable for V
OUT
> 4.8 V.
Note 6: The voltage applied to any pin must be greater than -0.4 V.
Gen. Note: Parameters with min. or max. values are 100% tested at T
A
= 25
°C.
TK73241MCLH, TK73242MCLH ELECTRICAL CHARACTERISTICS TABLE 2
Test Conditions: V
IN
= V
OUT(TYP)
+ 1 V, I
OUT
= 30 mA, T
A
= 25
°C,
unless otherwise specified.
Room Temp. Range (T
A
= 25
°C)
V
OUT(MIN)
V
OUT(MAX)
4.067 V
4.167 V
4.133 V
4.233 V
Full Temp. Range (T
A
= -10 to +60
°C)
V
OUT(MIN)
V
OUT(MAX)
4.050 V
4.150 V
4.150 V
4.250 V
Output Voltage
Voltage Code
4.1 V
4.2 V
41
42
January 1999 TOKO, Inc.
Page 5
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