LM3501

www.ti.com

SNVS230C – DECEMBER 2003 – REVISED MAY 2013

Electrical Characteristics

Specifications in standard type face are for TA = 25°C and those in boldface type apply over the Operating Temperature

Range of TA = −10°C to +85°C. Unless otherwise specified VIN = 2.7V and specifications apply to both LM3501-16 and

LM3501-21.

Min

Typ

Max

Symbol

Parameter

Conditions

Units

(1)

(2)

(1)

IQ

Quiescent Current, Device Not

FB > 0.54V

0.95

1.2

Switching

mA

Quiescent Current, Device

FB = 0V

2

2.5

Switching

Shutdown

SHDN = 0V

0.1

2

µA

VFB

Feedback Voltage

CNTRL = 2.7V,

0.485

0.515

0.545

VIN = 2.7V to 7V

V

CNTRL = 1V,

0.14

0.19

0.24

VIN = 2.7V to 7V

ΔVFB

Feedback Voltage Line Regulation

VIN = 2.7V to 7V

0.1

0.5

%/V

ICL

Switch Current Limit

VIN = 2.7V,

275

400

480

(LM3501-16)

Duty Cycle = 80%

VIN = 3.0V,

255

400

530

Duty Cycle = 70%

mA

Switch Current Limit

VIN = 2.7V,

420

640

770

(LM3501-21)

Duty Cycle = 70%

VIN = 3.0V,

450

670

800

Duty Cycle = 63%

IB

FB Pin Bias Current

FB = 0.5V (3)

45

200

nA

VIN

Input Voltage Range

2.7

7.0

V

RDSON

NMOS Switch RDSON

VIN = 2.7V, ISW = 300 mA

0.43

Ω

PMOS Switch RDSON

VOUT = 6V, ISW = 300 mA

1.3

2.3

DLimit

Duty Cycle Limit

FB = 0V

80

87

(LM3501-16)

%

Duty Cycle Limit

FB = 0V

85

94

(LM3501-21)

FSW

Switching Frequency

0.85

1.0

1.15

MHz

ISD

SHDN Pin Current (4)

SHDN = 5.5V

1.8

4

SHDN = 2.7V

1

2.5

µA

SHDN = GND

0.1

ICNTRL

CNTRL Pin Current (4)

VCNTRL = 2.7V

10

20

µA

VCNTRL = 1V

4

15

IL

Switch Leakage Current

VSW = 15V

0.01

0.5

(LM3501-16)

µA

Switch Leakage Current

VSW = 20V

0.01

2.0

(LM3501-21)

UVP

Input Undervoltage Lockout

ON Threshold

2.4

2.5

2.6

V

OFF Threshold

2.3

2.4

2.5

OVP

Output Overvoltage Protection

ON Threshold

15

15.5

16

V

(LM3501-16)

OFF Threshold

14

14.6

15

Output Overvoltage Protection

ON Threshold

20

20.5

21

V

(LM3501-21)

OFF Threshold

19

19.5

20

(1)

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

production tested, specified through statistical analysis or specified by design. 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).

(2)

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

(3)

Feedback current flows out of the pin.

(4)

Current flows into the pin.

Copyright © 2003–2013, Texas Instruments Incorporated

Submit Documentation Feedback

5

Product Folder Links: LM3501