NCP3520/NCP3521

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3

PACKAGE PIN DESCRIPTION Micro8

Pin #

Symbol

Description

1

NRCS

Non Rush current on Startup. Capacitor to ground controls output voltage slew rate and short circuit

delay time.

2

GND

Ground.

3

EN

Enable input control.

4

VCC

Power Supply Voltage Input.

5

VFB

Voltage Feedback pin into the error amplifier for maintaining the output voltage.

6

VS

Source input. Provides pulldown capability (1.2 mA operating & 220 mA turnoff) for fast output voltage

response time.

7

G

Gate Drive for the external NFET.

8

VD

NFET Drain input for voltage sensing.

MAXIMUM RATINGS

Rating

Value

Unit

All Pins

−0.3 to 7

V

IG (DC)

IG (AC)

IVS (DC)

10

10

300

mA

Electrostatic Discharge, Human Body Model

1.5

kV

Electrostatic Discharge, Machine Model

100

V

Package Thermal Resistance

Micro8

238

°C/W

Operating Junction Temperature

−10 to 150

°C

Storage Temperature Range

−55 to 150

°C

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

otherwise specified)

Characteristic

Conditions

Min

Typ

Max

Unit

REGULATOR OUTPUT

Feedback Voltage (NCP3520)

(Note 1)

1.188

1.176

1.200

1.200

1.212

1.224

V

V

Feedback Voltage (NCP3521)

(Note 1)

1.485

1.470

1.500

1.500

1.515

1.530

V

V

Supply Current

Sleep Mode

Run Mode

Short Circuit Latch Condition

EN = 0 V

EN = 3 V

EN = 3 V

−

−

−

0

1.25

0.5

10

1.7

1.7

mA

mA

mA

Line Regulation (NCP3520)

−

1.2

1.2

6.0

6.0

mV

mV

Line Regulation (NCP3521)

−

1.5

1.5

7.5

7.5

mV

mV

Load Regulation (Note 2)

−

0.50

10

mV

1. Guaranteed by Design

2. Load regulation may vary with the selection of an external FET other than the NTMS4107N.

3. See “External Components” section on Page 8.