LM2736 datasheet(3/31 Pages) TI

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LM2736

www.ti.com

SNVS316F – SEPTEMBER 2004 – REVISED APRIL 2013

Operating Ratings

(1)

VIN

3V to 18V

SW Voltage

-0.5V to 18V

Boost Voltage

-0.5V to 23V

Boost to SW Voltage

1.6V to 5.5V

Junction Temperature Range

−40°C to +125°C

Thermal Resistance

θJA

(2)

118°C/W

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is intended to be functional, but specific performance is not ensured. For specific specifications and the test conditions,

see Electrical Characteristics.

(2)

Thermal shutdown will occur if the junction temperature exceeds 165°C. The maximum power dissipation is a function of TJ(MAX) , θJA

and TA . The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) – TA)/θJA . All numbers apply for

packages soldered directly onto a 3” x 3” PC board with 2oz. copper on 4 layers in still air. For a 2 layer board using 1 oz. copper in still

air,

θJA = 204°C/W.

Electrical Characteristics

Specifications with standard typeface are for TJ = 25°C, and those in boldface type apply over the full Operating

Temperature Range (TJ = -40°C to 125°C). VIN = 5V, VBOOST - VSW = 5V unless otherwise specified. Datasheet min/max

specification limits are ensured by design, test, or statistical analysis.

Symbol

Parameter

Conditions

Min(1)

Typ(2)

Max(1)

Units

VFB

Feedback Voltage

1.225

1.250

1.275

ΔVFB/ΔVIN

Feedback Voltage Line Regulation

VIN = 3V to 18V

0.01

% / V

IFB

Feedback Input Bias Current

Sink/Source

250

Undervoltage Lockout

VIN Rising

2.74

2.90

UVLO

Undervoltage Lockout

VIN Falling

2.0

2.3

UVLO Hysteresis

0.30

0.44

0.62

LM2736X

1.2

1.6

1.9

FSW

Switching Frequency

MHz

LM2736Y

0.40

0.55

0.66

LM2736X

DMAX

Maximum Duty Cycle

LM2736Y

LM2736X

DMIN

Minimum Duty Cycle

LM2736Y

RDS(ON)

Switch ON Resistance

VBOOST - VSW = 3V

350

650

Ω

ICL

Switch Current Limit

VBOOST - VSW = 3V

1.0

1.5

2.3

Quiescent Current

Switching

1.5

2.5

Quiescent Current (shutdown)

VEN = 0V

LM2736X (50% Duty Cycle)

2.2

3.3

IBOOST

Boost Pin Current

LM2736Y (50% Duty Cycle)

0.9

1.6

Shutdown Threshold Voltage

VEN Falling

0.4

VEN_TH

Enable Threshold Voltage

VEN Rising

1.8

IEN

Enable Pin Current

Sink/Source

ISW

Switch Leakage

(1)

Specified to Texas Instruments' Average Outgoing Quality Level (AOQL).

(2)

Typicals represent the most likely parametric norm.

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