LM2695 datasheet(4/21 Pages) TI

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LM2695

SNVS413A – JANUARY 2006 – REVISED APRIL 2013

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Electrical Characteristics

Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction

Temperature (TJ) range. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical

values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless

otherwise stated the following conditions apply: VIN = 24V, RON = 200kΩ

(1).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Start-Up Regulator, VCC

VCCReg

VCC regulated output

6.6

7.4

ICC = 0 mA,

VIN-VCC dropout voltage

1.3

VCC = UVLOVCC + 250 mV

VCC output impedance

0 mA

≤ ICC ≤ 5 mA

140

Ω

VCC current limit

(2)

VCC = 0V

9.7

UVLOVCC

VCC under-voltage lockout

VCC increasing

5.7

threshold

UVLOVCC hysteresis

VCC decreasing

150

UVLOVCC filter delay

100 mV overdrive

µs

IIN operating current

Non-switching, FB = 3V

0.5

0.8

IIN shutdown current

RON/SD = 0V

200

µA

Switch Characteristics

Rds(on)

Buck Switch Rds(on)

ITEST = 200 mA

0.33

0.7

Ω

UVLOGD

Gate Drive UVLO

VBST - VSW Increasing

3.0

4.4

5.5

UVLOGD hysteresis

480

Softstart Pin

Pull-up voltage

2.5

Internal current source

12.3

µA

Current Limit

ILIM

Threshold

Current out of ISEN

1.25

1.5

Resistance from ISEN to SGND

130

Ω

Response time

150

On Timer

tON - 1

On-time

VIN = 10V, RON = 200 kΩ

2.1

2.8

3.6

µs

tON - 2

On-time

VIN = 30V, RON = 200 kΩ

950

Shutdown threshold

Voltage at RON/SD rising

0.45

0.8

1.2

Threshold hysteresis

Voltage at RON/SD falling

Off Timer

tOFF

Minimum Off-time

250

Regulation and Over-Voltage Comparators (FB Pin)

VREF

FB regulation threshold

SS pin = steady state

2.440

2.5

2.550

FB over-voltage threshold

2.9

FB bias current

Thermal Shutdown

TSD

Thermal shutdown temperature

175

°C

Thermal shutdown hysteresis

°C

Thermal Resistance

θJA

Junction to Ambient

°C/W

Both Packages

0 LFPM Air Flow

θJC

Junction to Case

Both Packages

6.6

°C/W

(1)

Typical specifications represent the most likely parametric norm at 25°C operation.

(2)

VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading

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