NCP5331 datasheet(6/38 Pages) ONSEMI

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NCP5331

http://onsemi.com

ELECTRICAL CHARACTERISTICS (continued) (0

°C < TA < 70°C; 0°C < TJ < 125°C; 9.0 V < VCCL < 16 V; 9.0 V < VCCH < 20 V;

9.0 V < VCCL1 = VCCL2 < 14 V; CGATE = 3.3 nF, RROSC = 32.4 kΩ, CCOMP = 1.0 nF, C5V(REF) = 0.1 µF, DAC Code 01110 (1.2 V),

CVCC = 1.0 µF, 0.25 V ≤ ILIM ≤ 1.0 V; unless otherwise noted)

Characteristic

Test Conditions

Min

Typ

Max

Unit

Voltage Identification DAC (continued)

-SEN Bias Current

LGND < 55 mV, All DAC Codes

120

µA

-SEN Offset from GND

-150

200

Power Good Output

Internal Delay Time

175

290

425

µs

PWRGD Low Output Voltage

IPGD = 4.0 mA

250

400

Output Leakage Current

VPGD = 5.5 V

0.1

2.0

µA

VCORE/CSREF Comparator

Threshold Voltage

Tolerance from DAC Setting

-15%

-12.5%

-10%

CPGD Charge Current

ROSC = 32.4 kΩ

14.5

17.5

µA

CPGD Comparator Threshold

Voltage

2.8

3.0

3.2

CPGD External Delay Time

CPGD = 0.033 µF. Note 1.

4.8

6.0

7.8

Voltage Feedback Error Amplifier

VFB Bias Current

0.7 V < VFB < 1.6 V. Note 2.

9.4

10.3

11.1

µA

COMP Source Current

COMP = 0.5 V to 2.0 V; VFB = 0.8 V

µA

COMP Sink Current

COMP = 0.5 V to 2.0 V; VFB = 1.5 V

µA

COMP Discharge Threshold

Voltage

0.20

0.33

0.40

Transconductance

-10

µA < ICOMP < +10 µA

mmho

Output Impedance

2.5

Ω

Open Loop Dc Gain

Note 1.

Unity Gain Bandwidth

CCOMP = 0.01 µF

400

kHz

PSRR @ 1.0 kHz

COMP Max Voltage

VFB = 0.8 V, COMP Open

4.1

4.4

COMP Min Voltage

VFB = 1.5 V, COMP Open

0.1

0.2

Hiccup Latch Discharge Current

4.0

7.5

µA

Hiccup Latch Charge/Discharge

Ratio

4.0

PWM Comparators

Minimum Pulse Width

CS1 = CS2 = CSREF

235

280

Channel Start-Up Offset

CS1 = CS2 = VFB = CSREF = 0 V;

Measure COMP when GHx switch High

0.45

0.60

0.80

Overcurrent Shutdown Timer

Overcurrent Shutdown Voltage

Threshold

2.8

3.0

3.2

COVC Low Output Voltage

250

400

COVC Source Current

3.0

5.0

8.0

µA

1. Guaranteed by design. Not tested in production.

2. The VFB Bias Current changes with the value of ROSC per Figure 5.

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