Absolute Maximum Ratings

Operating Conditions

Maximum Supply Voltage

45V

Temperature Range

ON /OFF Pin Input Voltage

-0.3 ≤ V ≤ +25V

Supply Voltage

4.5V to 40V

Feedback Pin Voltage

-0.3 ≤ V ≤ +25V

Output Voltage to Ground

-1V

Storage Temperature Range

-65°C to +150°C

Power Dissipation

Internally limited

Maximum Junction Temperature

+150°C

ELECTRICAL CHARACTERISTICS

Characteristic

Symbol

Test Condition

Min

Typ

Max

Unit

LM7596-3.0

4.75V

0.2A

3.20

3.30

3.40

LM7596-5.0

7V

0.2A

4.85

5.0

5.15

Output Voltage

LM7596-12

15V

0.2A

11.64

12.0

12.36

V

LM7596-3.0

73

LM7596-5.0

80

LM7596-12

90

Efficiency

η

LM7596-Adj

73

%

Feedback Voltage

LM7596-Adj

4.5V

0.2A

1.210

1.230

1.250

V

Feedback Bias Current

Ib

LM7596-Adj

15

50

nA

Oscillator Frequency

127

150

173

kHz

Saturation Voltage

1.16

1.4

V

Max Duty Cycle (ON)

(Note 2)

100

Min Duty Cycle (OFF)

DC

(Note 3)

0

%

Current Limit

Peak Current (Note 1,2)

3.4

4.5

6.0

A

Output = 0V (Note 1,3)

50

µA

Output Leaked Current

2

30

mA

Quiescent Current

(Note 3)

5

10

mA

Standby

Quiescent Current

100

200

µA

1.3

Low (Regulator ON)

0.6

ON/OFF Pin Logic

Input

Threshold Voltage

High (Regulator OFF)

2.0

V

5

15

ON/OFF Pin Input

Current

0.02

5

µA

Note 1: No elements connected to output pin.

Note 2: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.

Note 3: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the A version, and 15V

for the 12V version. To force the output transistor switch OFF.

LM7596 Simple Switcher Power Converter 150kHz

3A Step-Down Voltage Regulator