NCV8843PWR2G(2006) 查看數據表（PDF） - ON Semiconductor

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NCV8843PWR2G
(Rev.:2006)

1.5 A, 340 kHz, Buck Regulator with Synchronization Capability

ON Semiconductor 

NCV8843

ELECTRICAL CHARACTERISTICS (−40°C < TJ < 125°C, 4.5 V< VIN < 40 V; unless otherwise specified.)

Characteristic

Test Conditions

Min

Typ

Oscillator

Operating Frequency

−

306

340

Frequency Line Regulation

−

−

0.05

Maximum Duty Cycle

−

85

90

VFB Frequency Foldback Threshold

PWM Comparator

−

0.29

0.32

Slope Compensation Voltage

Minimum Output Pulse Width

Power Switch

Fix VFB, DVC/DTON

VFB to VSW

5.0

9.0

−

100

Current Limit

Foldback Current

Saturation Voltage

Current Limit Delay

VFB > 0.36 V

VFB < 0.29 V

IOUT = 1.5 A, VBOOST = VIN + 2.5 V

(Note 3)

1.6

2.3

0.9

1.5

0.4

0.7

−

120

Error Amplifier

Internal Reference Voltage

−

1.244 1.270

Reference PSRR

(Note 3)

−

40

FB Input Bias Current

−

−

0.02

Output Source Current

Output Sink Current

Output High Voltage

Output Low Voltage

Unity Gain Bandwidth

VC = 1.270 V, VFB = 1.0 V

VC = 1.270 V, VFB = 2.0 V

VFB = 1.0 V

VFB = 2.0 V

(Note 3)

15

25

15

25

1.39

1.46

5.0

20

−

500

Open Loop Amplifier Gain

(Note 3)

−

70

Amplifier Transconductance

(Note 3)

−

6.4

Sync

Sync Frequency Range

−

377

−

Sync Pin Bias Current

Sync Threshold Voltage

VSYNC = 5.0 V

−

−

360

0.9

1.5

Shutdown

Shutdown Threshold Voltage

−

1.0

1.3

Shutdown Pin Bias Current

Thermal Shutdown

VSHDNB = 0 V

0.14

5.00

Overtemperature Trip Point

(Note 3)

175

185

Thermal Shutdown Hysteresis

(Note 3)

−

42

3. Guaranteed by design, not 100% tested in production.

Max

374

0.15

95

0.36

17

200

3.0

2.1

1.0

160

1.296

−

0.1

35

35

1.53

60

−

−

−

710

485

1.9

1.6

35

195

−

Unit

kHz

%/V

%

V

mV/ms

ns

A

A

V

ns

V

dB

mA

mA

mA

V

mV

kHz

dB

mA/V

kHz

mA

V

V

mA

°C

°C

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