MP2113 – 1.5A, SYNCHRONOUS STEP-DOWN CONVERTER WITH DYNAMIC VOLTAGE CONTROL

MP2113 Rev. 1.0

www.MonolithicPower.com

3

4/4/2011

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© 2011 MPS. All Rights Reserved.

(4)

Parameters

Condition

Min

Typ

Max

Units

IN Undervoltage Lockout Threshold

Rising Edge

2.40

2.65

V

IN Undervoltage Lockout Hysteresis

160

mV

Regulated FB Voltage

0.588

0.600

0.612

V

0.582

0.600

0.618

Regulated FB Voltage Hysteresis

CTRL = 0 (Async Mode)

12

20

mV

FB Input Bias Current

-50

-2

+50

nA

SW PFET On Resistance

0.25

Ω

SW NFET On Resistance

0.19

Ω

SW Schottky Diode Forward Voltage

-0.5

V

SW PFET Leakage Current

-1

0.1

1

µA

SW NFET Leakage Current

-5

1.5

5

µA

SW PFET Peak Current Limit

Duty Cycle=100%,

Current Pulse Width <1mS

1.7

2.2

A

Oscillator Frequency

1.3

1.5

1.7

MHz

Note:

4) Production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.

PIN FUNCTIONS

Pin #

Name

Description

1

FB

Feedback input.

2

PGOOD

Power-good indicator output. “Open-drain” output indicating that the output is within

10% of the final regulation value. “Low” output indicates output is more than 10%

lower than regulation level. PGOOD is pulled down in shutdown. PGOOD

comparator shall have 200us deglitch timer to avoid false trigger during transition of

operation modes.

3

GND

Ground pin.

4

SW

Switch node to the inductor.

5

IN

Input supply pin.

6

CTRL

Input to control the operation mode. “High” set MP2113 in forced PWM mode,

DRN=Low (Pull Down) and “Low” sets MP2113 in low power asynchronous mode,

DRN=High. CTRL is pulled up to VIN with 1uA current.

7

EN

Enable input, “High” enables MP2113. EN is pulled to GND with 1Meg internal

resistor.

8

DRN

Drain output of an internal switch, controlled by CTRL input. DRN is open circuit

when CTRL is “low”, and DRN is pulled to ground with on resistance less than

100ohm when CTRL is “high”.