US1260

3-2

Rev. 1.9

3/22/99

Unless otherwise specified ,these specifications apply over ,Cin=1 uF,Cout=10uF,and Tj=0 to 150

°C.Typical

values refer to Tj=25

°C. Ifl=6A for output #1,and Ifl=1A for output #2. Vfb=Vo for both outputs.Vctrl=Vin=3.3V.

PARAMETER

SYM

TEST CONDITION

MIN

TYP

MAX

UNITS

Vctrl Input Voltage

3.0

V

Reference Voltage

Vref

Io=10mA,Tj=25

°C

1.188 1.200

1.212

V

Io=10mA

1.176

1.200

1.224

Line Regulation

Io=10mA,Vout+1.3V<Vin=Vctrl<7V

0.2

%

Load Regulation (note 1)

10mA<Io<Ifl

0.4

%

Dropout Voltage (output #2)

Io=4A, Vctrl=4.75V , Vin=3.3V

1.0

V

Io=3A, Vctrl=4.75V , Vin=3.3V

0.7

V

(Note 2)

Io=2A, Vctrl=4.75V , Vin=3.3V

0.35

0.5

Dropout Voltage (output #1)

Io=1A, Vctrl=4.75V , Vin=3.3V

0.4

0.6

V

(Note 2)

Io=1A, Vctrl=Vin=4.75V

1.3

Current Limit (output #2)

dVo=100mV

6.1

A

Current Limit (output #1)

dVo=100mV

1.1

A

Thermal Regulation

30 mS pulse,Io=Ifl

0.01

0.02

%/W

Ripple Rejection

f=120HZ ,Co=25uF Tantalum

Io=0.5*Ifl

70

dB

Feedback Pin Input Current

Ifb

Io=10mA

0.02

uA

Temperature Stability

Io=10mA

0.5

%

Long Term Stability

Ta=125

°C,1000 Hrs

0.3

1

%

RMS Output Noise

Ta=25

°C 10hz<f<10khz

0.003

%Vo

Minimum Load Current(Note 3)

5

mA

Note 3 : Minimum load current is defined as the mini-

mum current required at the output in order for the out-

put voltage to maintain regulation. Typically the resistor

dividers are selected such that it automatically main-

tains this current.

Note 1 : Low duty cycle pulse testing with Kelvin con-

nections are required in order to maintain accurate data.

Note 2 : Drop-out voltage is defined as the minimum

differential voltage between Vin and Vout required to main-

tain regulation at Vout. It is measured when the output

voltage drops 1% below its nominal value.

ABSOLUTE MAXIMUM RATINGS

ABSOLUTE MAXIMUM RATINGS

Input Voltage (Vin)

.............................................................

7V

Power Dissipation

............................................

Internally Limited

Storage Temperature Range ................................

-65

Operating Junction Temperature Range ...................... 0

PACKAGE INFORMATION

PACKAGE INFORMATION

7 PIN PLASTIC TO220

7 PIN PLASTIC TO263

7 PIN POWER FLEX (P)

ELECTRICAL SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

FRONT VIEW

1

2

3

4

5

6

7

Vctrl

Vfb1

Vfb2

Gnd

Vout2

Vin

Vout1

FRONT VIEW

1

2

3

4

5

6

7

Vctrl

Vfb1

Vfb2

Gnd

Vout2

Vin

Vout1

M7

FRONT VIEW

1

2

3

4

5

6

7

Vctrl

Vfb1

Vfb2

Gnd

Vout2

Vin

Vout1