LM5000

SNVS176D – MAY 2004 – REVISED MARCH 2007

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Electrical Characteristics

Min

Typ

Max

Symbol

Parameter

Conditions

Units

(1)

(2)

(1)

Quiescent Current

FB = 2V (Not Switching)

2.0

2.5

mA

FS = 0V

FB = 2V (Not Switching)

2.1

2.5

mA

FS = Open

18

30

µA

Feedback Voltage

1.2330

1.259

1.2840

V

Switch Current Limit

1.35

2.0

2.7

A

Feedback Voltage Line

3.1V

0.001

0.04

%/V

Regulation

55

200

nA

BV

Output Switch Breakdown

80

V

Voltage

76

0.5µA

Input Voltage Range

3.1

40

V

Error Amp Transconductance

ΔI = 5µA

150

410

750

µmho

Error Amp Voltage Gain

280

V/V

Maximum Duty Cycle

FS = 0V

85

90

%

LM5000-3

Maximum Duty Cycle

FS = 0V

85

90

%

LM5000-6

Minimum On Time

165

ns

Switching Frequency LM5000-

FS = 0V

240

300

360

kHz

3

FS = Open

550

700

840

Switching Frequency LM5000-

FS = 0V

485

600

715

6

FS = Open

1.055

1.3

1.545

MHz

Shutdown Pin Current

−1

-2

µA

Switch Leakage Current

0.008

5

µA

160

445

m

Ω

SHDN Threshold

Output High

0.9

0.6

V

Output Low

0.6

0.3

V

UVLO

On Threshold

2.74

2.92

3.10

V

Off Threshold

2.60

2. 77

2.96

V

OVP

0.67

V

Softstart Current

8

11

14

µA

Thermal Resistance

TSSOP, Package only

150

°C/W

LLP, Package only

45

(1)

All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits

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

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

(2)

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

(3)

Bias current flows into FB pin.

4

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