LM5171 datasheet(5/19 Pages) HTC

5 / 19 page

1.5A, 280kHz, Boost Regulator

LM5171

Dec. 2010 - Rev. 1.2.1

- 5

HTC

ELECTRICAL CHARACTERISTICS (Continued)

2.7V < Vcc < 30 V, 0°C < TJ < 125°C, unless otherwise stated.

Characteristics

Test Condition

Min

TYP

Max

Unit

Sync / Shutdown

Sync Range

320

500

kHz

Sync Pulse Transition Threshold

Rise Time = 20 ns

2.5

SS = 0V

-15

-3

SS Bias Current

SS = 3.0V

Shutdown Threshold

0.50

0.85

1.20

2.7V ≤ Vcc ≤ 12V

350

Shutdown Delay

12V ≤ Vcc ≤ 30V

200

Power Switch

ISWITCH = 1.5A

(Note 2)

0.8

1.4

ISWITCH = 1.0A, 0°C ≤ TA ≤ 70°C

0.55

1.00

Switch Saturation Voltage

ISWITCH = 10mA

0.09

0.45

50% duty cycle

(Note 2)

1.6

1.9

2.4

Switch Current Limit

80% duty cycle

(Note 2)

1.5

1.7

2.2

Minimum Pulse Width

FB = 0V, Isw = 4.0A

(Note 2)

200

250

300

2.7V ≤ VCC ≤ 12V, 10mA ≤ Isw ≤1.0A

mA/A

12V ≤ VCC ≤ 30V, 10mA ≤ Isw ≤ 1.0A

100

mA/A

2.7V ≤ VCC ≤ 12V,10mA ≤ Isw ≤ 1.5A

(Note2)

mA/A

∆Icc/∆Ivsw

12V ≤ VCC ≤ 30V, 10mA≤ Isw ≤ 1.5A

(Note2)

100

mA/A

Switch Leakage

Vsw = 40V, Vcc = 0V

2.0

100

General

Operating Current

Isw = 0

5.5

Vc < 0.8V, SS = 0V, 2.7V ≤ Vcc ≤ 12V

Shutdown Mode Current

Vc < 0.8V, SS = 0V, 12V ≤ Vcc ≤ 30V

100

Minimum Operating Input Voltage

Vsw Switching, Maximum Isw = 10mA

2.45

2.70

Thermal Shutdown

(Note 2)

150

180

210

°C

Thermal Hysteresis

(Note 2)

°C

Note 2. Guaranteed by design, not 100% tested in production.

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