SC220(2012) Просмотр технического описания (PDF) - Semtech Corporation

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Компоненты Описание

производитель

SC220
(Rev.:2012)

20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator

Semtech Corporation 

SC220

Absolute Maximum Ratings (1)

Recommended Operating Conditions

AVIN, PVIN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0

VOUT, FB, EN, SW (V) . . . . . . . . . . . . . . . . . . . . .-0.3 to (V +0.3)

IN

AGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 to +0.3

ESD Protection Level(2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3kV

Input Voltage Range (V) . . . . . . . . . . . . . . . . . . . . . +2.7 to +5.5

Output DC Current (mA). . . . . . . . . . . . . . . . . . . . . up to 650

Operating Temperature Range (°C) . . . . . . . . . . -40 to +85

Thermal Information

Thermal Resistance, Junction to Ambient(3) (°C/W)....38

Junction Temperature Range (°C) . . . . . . . . . . -40 to +150

Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150

Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . . . 260

Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters

specified in the Electrical Characteristics section is not recommended.

Notes:

(1) All voltage values in this section are with respect to PGND pin voltage.

(2) Tested according to JEDEC standard JESD22-A114-B.

(3) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

Electrical Characteristics

Unless otherwise specified: AVIN = PVIN = EN = 3.6V, C = C = 1.0μF, L = 220nH. T = 25°C for typical values, -40°C < T = T < 85°C for minimum

IN OUT

A

AJ

and maximum values.

Parameter

POWER SUPPLY

Input Voltage

Input Quiescent Current

Shutdown Current

POWER SWITCH

PMOS On Resistance

NMOS On Resistance

OSCILLATOR

Switching Frequency

REGULATION

Output Voltage Tolerance(1)

Current Limit

Soft-Start(1)

Feedback Voltage

Symbol

Condition

Min Typ Max Units

V

IN

I

VIN_Q

I

VIN_SD

f

OSC

V

OUT_TOL

I

LIMIT

t

SS

VFB

No load, no switching

EN = 0V

PWM Mode

EN pin low to high

2.7V ≤ VIN ≤ 5.5V

2.7

5.5

V

19

40

μA

1.0

μA

400

mΩ

360

mΩ

16

20

24

MHz

-4.0

4.0

%

850

1300

mA

40

μs

0.97

1.00

1.03

V

3

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