LM2672

SNVS136K – SEPTEMBER 1998 – REVISED APRIL 2013

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LM2672-12 Electrical Characteristics

Symbol

Parameter

Conditions

Units

SYSTEM PARAMETERS Test Circuit Figure 22(3)

Output Voltage

12

11.82/11.64

12.18/12.36

V

η

Efficiency

94

%

(1)

Typical numbers are at 25°C and represent the most likely norm.

(2)

All limits specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits

are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control

(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).

(3)

External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect

switching regulator performance. When the LM2672 is used as shown in Figure 22 and Figure 23 test circuits, system performance will

be as specified by the system parameters section of the Electrical Characteristics.

LM2672-ADJ Electrical Characteristics

Symbol

Parameter

Conditions

Units

SYSTEM PARAMETERS Test Circuit Figure 23(3)

Feedback Voltage

1.210

1.192/1.174

1.228/1.246

V

(see Circuit of Figure 23)

Feedback Voltage

1.210

1.192/1.174

1.228/1.246

V

(see Circuit of Figure 23)

η

Efficiency

90

%

(1)

Typical numbers are at 25°C and represent the most likely norm.

(2)

All limits specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits

are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control

(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).

(3)

External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect

switching regulator performance. When the LM2672 is used as shown in Figure 22 and Figure 23 test circuits, system performance will

be as specified by the system parameters section of the Electrical Characteristics.

All Output Voltage Versions

Symbol

Parameters

Conditions

Typ

Min

Max

Units

DEVICE PARAMETERS

Quiescent Current

2.5

3.6

mA

For 3.3V, 5.0V, and ADJ Versions

2.5

mA

For 12V Versions

Standby Quiescent Current

ON/OFF Pin = 0V

50

100/150

μA

Current Limit

1.55

1.25/1.2

2.1/2.2

A

Output Leakage Current

1

25

μA

6

15

mA

Switch On-Resistance

0.25

0.30/0.50

Ω

Oscillator Frequency

Measured at Switch Pin

260

225

275

kHz

D

Maximum Duty Cycle

95

%

Minimum Duty Cycle

0

%

Feedback Bias

85

nA

Current

ADJ Version Only

4

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