NCP81038

http://onsemi.com

6

Table 3. ELECTRICAL CHARACTERISTICS

(VIN = 12 V, Vout = 5.0 V, TA = +25°C for typical value; 0°C < TA < 85°C for min/max values unless noted otherwise)

Parameter

Units

Max

Typ

Min

Test Conditions

Symbol

FEEDBACK VOLTAGE

Reference Voltage

792

800

808

mV

Feedback Voltage Line Regulation

5V_LDOOUT = 4.5 V ~ 5.5 V

0.25

%/V

DIFFERENTIAL CURRENT SENSE AMPLIFIER

CSP and CSN Common−mode Input

Voltage Range

Refer to AGND

−0.2

5.5

V

Current Sense Input to Output Gain

(CSP)−(CSN) = 10 mV

200

mA/V

Differential Input Voltage Range

−60

60

mV

OVER CURRENT PROTECTION

OCP Threshold Voltage

V(CSP)−V(CSN) @ 25°C

35

40

45

mV

V(CSP)−V(CSN) @ 0 ~ 85°C

34

46

mV

OCP Trigger Clock Tick

After EN, latch off after trigger # clocks

16

Short Circuit OCP Threshold Voltage

60

mV

GATE DRIVER

GH Pull−High Resistance

RH_GH

Source, V(BST−GH) = 0.1

2.5

W

GH Pull−Low Resistance

RL_GH

Sink, V(GH−SWN) = 0.1 V

1.5

W

GL Pull−High Resistance

RH_GL

Source, V(VCC−GL) = 0.1 V

2.0

W

GL Pull−Low Resistance

RL_GL

Sink, V(GL−PGND) = 0.1 V

1.0

W

Dead Time

GL off to GH on

10

20

30

ns

GH off to GL on

10

20

30

ns

VOLTAGE MONITOR

VCC Start Threshold

3.7

4.2

4.4

V

VCC UVLO Hysteresis

100

200

300

mV

Power Good Threshold

PG in from lower

91.5

95

97.5

%

PG hysteresis

5.0

%

Power Good High Delay

After soft start is done

500

ms

Power Good Low Delay

1.5

ms

Power Good Sink Current

PG = 0.4 V

2.5

5.0

mA

Output Overvoltage Rising Threshold

After VCC POR, with respect to VFB

106

110

118

%Vref

Overvoltage Fault Blanking Time

1.5

ms

Output Under-Voltage Trip Threshold

After soft start, with respect to VFB

45

50

55

%Vref

Under-voltage Protection Blanking Time

ms

Under−voltage Protection Delay

2.0

ms

PWM

Minimum Controllable ON Time

50

ns

Minimum OFF Time

100

150

ns

PWM Ramp Offset

0.36

0.4

0.44

V

PWM Ramp Amplitude

VIN = 5 V

1.25

V

VIN = 12 V

3.0

V

PWM Comparator Propagation Delay

10 mV to 20 mV overdrive

25

30

ns

3. Guaranteed by Design

4. Parameters are for design only, not for product test.