LM3501

SNVS230C – DECEMBER 2003 – REVISED MAY 2013

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Electrical Characteristics (continued)

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)

IVout

VOUT Bias Current

VOUT = 15V, SHDN = 1.5V

260

400

(LM3501-16)

µA

VOUT Bias Current

VOUT = 20V, SHDN = 1.5V

300

460

(LM3501-21)

IVL

PMOS Switch Leakage Current

VOUT = 15V, VSW = 0V

0.01

3

(LM3501-16)

µA

PMOS Switch Leakage Current

VOUT = 20V, VSW = 0V

0.01

3

(LM3501-21)

CNTRL

LED power off

75

mV

Threshold

LED power on

125

SHDN

SHDN low

0.65

0.3

V

Threshold

SHDN High

1.1

0.65

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

Range (TJ = −40°C to +125°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, VIN = 2.7V to 7V

0.485

0.515

0.545

V

CNTRL = 1V, VIN = 2.7V to 7V

0.14

0.19

0.24

ΔVFB

Feedback Voltage Line Regulation

VIN = 2.7V to 7V

0.1

0.5

%/V

ICL

Switch Current Limit

VIN = 3.0V,

400

(LM3501-16)

Duty Cycle = 70%

mA

Switch Current Limit

VIN = 3.0V,

670

(LM3501-21)

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

87

(LM3501-16)

%

Duty Cycle Limit

FB = 0V

94

(LM3501-21)

FSW

Switching Frequency

0.8

1.0

1.2

MHz

ISD

SHDN Pin Current (4)

SHDN = 5.5V

1.8

4

SHDN = 2.7V

1

2.5

µA

SHDN = GND

0.1

(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.

6

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