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IMP37

Low Dropout Positive Voltage Regulators

IMP, Inc 

IMP37

Absolute Maximum Ratings

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 7V

Operating Junction Temperature . . . . . . . . . 0°C to 150°C

Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature (Soldering) . . . . . . . . . . . . . 300°C for 10 seconds

These are stress ratings only and functional operation is not implied.

Exposure to absolute maximum ratings for prolonged time periods may

affect device reliability. All voltages are with respect to ground.

Electrical Characteristics

Specifications apply over the junction operating temperature range of TJ = 0°C to +125°C unless otherwise noted.

Parameter

Symbol Suffix Conditions

Min Typ Max Units

Output Voltage

VOUT

–25 IOUT = 10mA, VIN = 4.85V, TJ = 25°C

10mA ≤ IOUT ≤ IMAX, 4.25V ≤ VIN ≤ 5.5V

2.475

2.45

–30 IOUT = 10mA, VIN = 5V, TJ = 25°C

2.97

10mA ≤ IOUT ≤ IMAX, 4.75V ≤ VIN ≤ 5.5V

2.94

–33 IOUT = 10mA, VIN = 5V, TJ = 25°C

3.267

10mA ≤ IOUT ≤ IMAX, 4.75V ≤ VIN ≤ 5.5V

3.235

Line Regulation

(Note 1)

Line Regulation

(Note 1)

–25 IOUT = 10mA, 4.25V ≤ (VIN) ≤ 5.5V

–30 IOUT = 10mA, 4.5V ≤ VIN ≤ 5.5V

–33 IOUT = 10mA, 4.5V ≤ VIN ≤ 5.5V

–25 IOUT = 10mA, 4.25V ≤ (VIN) ≤ 5.5V, TA = 25°C

–30 IOUT = 10mA, 4.5V ≤ VIN ≤ 5.5V, TA = 25°C

–33 IOUT = 10mA, 4.5V ≤ VIN ≤ 5.5V, TA = 25°C

Load Regulation

(Note 1)

–25 VIN = 4.25V, 5mA ≤ IOUT ≤ 800mA

–30 VIN = 4.75V, 5mA ≤ IOUT ≤ 800mA

–33 VIN = 4.75V, 5mA ≤ IOUT ≤ 800mA

Dropout Voltage

(Note 2)

–xx IOUT = 100mA

IOUT = 800mA

Current Limit

IOUT(MAX) –xx TJ = 25°C

800

Minimum Load Current

–xx

Quiescent Current

IQ

–xx VIN ≤ 6V

Thermal Regulation

TA = 25°C, 30ms Pulse

Ripple Rejection

fRIPPLE = 120Hz, VIN = 5V, TA = 25°C

51

VRIPPLE = 1Vp-p, ILOAD= 10mA

Temperature Stability

2.5

2.5

3.00

3.00

3.30

3.30

12

12

12

2.8

2.8

2.8

25

25

25

950

36

0.01

54

0.5

2.525

2.55

3.03

3.06

3.333

3.365

19

19

19

4.3

4.3

4.3

30

30

30

0.8

0.95

1200

5.0

75

0.1

V

mV

mV

mV

V

mA

mA

µA

%/W

dB

%

Long Term Stability

RMS Output Noise

Thermal Resistance

TA = 125°C, 1000 Hrs

(% of VOUT), 10Hz ≤ f ≤ 10kHz, TJ = 25°C

Junction-to-Case at TAB (TO-223)

0.3

0.003

15

Junction-to-Case at TAB (TO-263)

10

Notes: 1. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation

are measured with low duty cycle pulse testing to maintain a constant junction temperature.

2. Dropout voltage is specified over the full output current range. Dropout voltage is defined as the minimum input/output

differential measured at the specified output current.

3. Minimum load current is defined as the minimum output current required to maintain regulation.

%

%

°C/W

37_t07.eps

© 1999 IMP, Inc.

408-432-9100/www.impweb.com

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