TOKO TK73200MCL Datasheet

TK73200

C

PULSE

CONTROL

GND

BASE

NOISE

BYPASS

V

ADJ

I

PK

V

IN

ADJUSTABLE LOW DROPOUT REGULATOR

FEATURES

■ Up to 5 A Output Current Capability with External

PNP Transistor

■ Internal Short Circuit Protection

■ Excellent Load Regulation

■ CMOS/TTL-Compatible On/Off Switch

■ Internal Reverse Bias Current Protection Switch

■ Internal Thermal Shutdown

■ Wide Adjustable Output Voltage Range

(2.0 V to 12.0 V)

■ Continuous and Pulsed Current Modes

DESCRIPTION

The TK73200 is a controller IC for an adjustable low
dropout voltage regulator. The TK73200 and the external
PNP power transistor provide adjustable output voltages
from 2 to 12 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.

APPLICATIONS

■ Battery Powered Systems

■ Cellular/Cordless Telephones

■ Radio Control Systems

■ Wireless Communications Systems

■ Portable Instrumentations

■ Portable Computers

■ Personal Digital Assistants

■ Local Area Network (LAN) Receivers

■ Power Recovery for Microprocessors

TK73200

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.

BLOCK DIAGRAM

I

IN

PK C

PULSE

V

BASE

V

ORDERING INFORMATION

TK73200M L

Tape/Reel Code

Package Code

TAPE/REEL CODE

L: Tape Left

TEMP. RANGE

C: -30 to 80 °C

June 1999 TOKO, Inc. Page 1

Temp. Code

PACKAGE CODE

M: SOT23L-8

CONTROL

ON/OFF

CIRCUIT

BANDGAP

REFERENCE

GND

THERMAL

SENSOR

NOISE BYPASS

ADJ

TK73200

ABSOLUTE MAXIMUM RATINGS (NOTE 5)

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

TK73200 ELECTRICAL CHARACTERISTICS

Test conditions: VIN = V

LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU

OUT(TYP)

+ 1 V, TA = 25 °C, unless otherwise specified.

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

I

Q

I

YBTS

I

TUO

V

PORD

V

TUO

geReniLnoitalugeReniL

I

)L(ESAB

I

)H(ESAB

V

ESNES

RRnoitcejeRelppiR

V

ON

tnerruCtnecseiuQI

tnerruCybdnatSV

TUO

NI

IgnidulcxE,Am0=

TNOC

052063Aµ

FFOtuptuO,V8=1.0Aµ

tnerruCtuptuOtnednepeDrotsisnarTlanretxEA/NA

egatloVtuoporDtnednepeDrotsisnarTlanretxEA/NV

egatloVtuptuOsrotsiseRlanretxEybteS221V

V=

V

NI

V

)PYT(TUO

)PYT(TUO

otV1+

)2etoN(V6+

0.302Vm

geRdaoLnoitalugeRdaoLtnednepeDrotsisnarTlanretxE01Vm

WOLtnerruCesaBV8.1 ≤ VNI≤ V451Am

HGIHtnerruCesaBV1.4 ≤ VNI≤ V2104Am

edoMtimiLtnerruCsuounitnoC08001021Vm

egatloVtceteDtimiLtnerruC

edoMtimiLtnerruCesluP0709011Vm

C,zH004=f

L

C

N

I

TUO

V,Fµ1.0=

NI

V,Am03=

,Fµ01=

V=

)PYT(TUO

ELPPIR

,V5.1=
,smrVm001=

75Bd

)3etoN(

esioNtuptuO

)3etoN(

,zHk03otzH004=FPB,zHk1=f

31.0zH/Vµ

I

∆V
V

/∆T

C

ESLUP

egatloVecnerefeR 22.152.182.1V

ESLUP

TUO

fer

tnerruClanimreTniP)4etoN(515254Aµ

tneiciffeoCerutarepmeT 02C°/mpp

SNOITACIFICEPSLANIMRETLORTNOC

I

TNOC

V
V

)NO(TNOC

)FFO(TNOC

tnerruClortnoCV

TNOC

)NO(egatloVlortnoCNOtuptuO8.1V

)FFO(egatloVlortnoCFFOtuptuO6.0V

NOtuptuO,V8.1=5.602Aµ

Page 2 June 1999 TOKO, Inc.

TK73200

TK73200 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: 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 TA = 25 °C.

June 1999 TOKO, Inc. Page 3

TK73200

V

(

0

V/

DIV)

V

(10

V/

DIV)

V

(

V/

DIV)

I

(

A)

V

(

V)

I

(

A)

Note:Transistor: 2SB1115

TEST CIRCUIT

CPC

N

R

P

V

IN

CN = 0.1 µF
CP = 0.1 µF

C

IN

R

IPK

TK73200

CONT

CIN = 1 µF
CL = 4.7 µF
RP = 330 k
Continuous Current Limit Mode:
I

(mA) = 100 mV / R

SET

Pulse Current Limit Mode:
I

(mA) = 90 mV / R

SET

IPK

IPK

(Ω)

(Ω)

EMITTER

EXTERNAL

TRANSISTOR

COLLECTOR

BASE

R

1

C

L

R

2

V

OUT

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25 °C, external transistor is 2SB1115(NEC), unless otherwise specified.

V

= 1.25 ( 1 + R2 / R1)

OUT

20 kΩ ≤ R1 ≤ 68 kΩ

2.0 V ≤ V

OUT

≤12 V

VOUT

LINE REGULATION 1

m
5

OUT

0 10 20

VIN (V)

QUIESCENT CURRENT

INPUT VOLTAGE

5

4

3

m

Q

V

OUT

V

OUT

= 3.0 V

2

= 5.0 V

VS.

LINE REGULATION 2

m

OUT

0 10 20

VIN (V)

DROPOUT VOLTAGE

OUTPUT CURRENT AND

EXTERNAL TRANSISTORS

0

-100

m

-200

DROP

-300

VS.

2SB799

2SB1115

2SB1114

2SB1302

LOAD REGULATION

V

5 m

OUT

OUT

0 500 1000

I

(mA)

OUT

GROUND CURRENT

OUTPUT CURRENT

5

4

m

3

GND

2

TYPICAL

VS.

1

0

0 10 20

VIN (V)

-400

0 500 1000

I

(mA)

OUT

1

0

0 500 1000

I

(mA)

OUT

Page 4 June 1999 TOKO, Inc.