LM3501 datasheet(7/26 Pages) TI1

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LM3501

www.ti.com

SNVS230B – MAY 2004 – REVISED MAY 2005

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)

Quiescent Current, Device Not

FB > 0.54V

0.95

1.2

Switching

Quiescent Current, Device

FB = 0V

2.5

Switching

Shutdown

SHDN = 0V

0.1

µA

VFB

Feedback Voltage

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

0.485

0.515

0.545

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%

Switch Current Limit

VIN = 3.0V,

670

(LM3501-21)

Duty Cycle = 63%

FB Pin Bias Current

FB = 0.5V (3)

200

VIN

Input Voltage Range

2.7

7.0

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

(LM3501-16)

Duty Cycle Limit

FB = 0V

(LM3501-21)

FSW

Switching Frequency

0.8

1.0

1.2

MHz

ISD

SHDN Pin Current (4)

SHDN = 5.5V

1.8

SHDN = 2.7V

2.5

µA

SHDN = GND

0.1

ICNTRL

CNTRL Pin Current (4)

VCNTRL = 2.7V

µA

VCNTRL = 1V

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

OFF Threshold

2.3

2.4

2.5

OVP

Output Overvoltage Protection

ON Threshold

15.5

(LM3501-16)

OFF Threshold

14.6

Output Overvoltage Protection

ON Threshold

20.5

(LM3501-21)

OFF Threshold

19.5

IVout

VOUT Leakage Current

VOUT = 15V, SHDN = 1.5V

260

400

(LM3501-16)

µA

VOUT Leakage Current

VOUT = 20V, SHDN = 1.5V

300

460

(LM3501-21)

IVL

PMOS Switch Leakage Current

VOUT = 15V, VSW = 0V

0.01

(LM3501-16)

µA

PMOS Switch Leakage Current

VOUT = 20V, VSW = 0V

0.01

(LM3501-21)

(1)

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

are production tested, guaranteed through statistical analysis or guaranteed by design. 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)

Feedback current flows out of the pin.

(4)

Current flows into the pin.

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