MIC2871 datasheet(3/24 Pages) MICREL

3 / 24 page

Micrel, Inc.

MIC2871

May 29, 2013

052913-1.0 (while in progress)

Revision 1.0 (final document)

Absolute Maximum Ratings

(2)

Input Voltage (VIN) ........................................ −0.3V to +6.0V

General I/O Voltage (VFEN1, VFEN2) .................... −0.3V to VIN

VOUT and VLED Voltage.................................. −0.3V to +6.0V

Single-Wire I/O Voltage (VDC) ........................... −0.3V to VIN

VFRSET Voltage ................................................... −0.3V to VIN

VSW Voltage .................................................. −0.3V to +6.0V

Lead Temperature (soldering, 10s).......................... +260°C

Junction Temperature ................................... 0°C to +150°C

Storage Temperature (Ts) ......................... −40°C to +150°C

ESD Rating

(5)............................... 2kV, HBM and 200V, MM

Operating Ratings

(3)

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

Enable Input Voltage (VFEN1, VFEN2) ....................... 0V to VIN

Single-Wire I/O Voltage (VDC) ................................ 0V to VIN

Junction Temperature (TJ) ........................ −40°C to +125°C

Power Dissipation (PD)........................... Internally Limited

(4)

Package Thermal Resistance

3mm × 2mm LDFN (

JA)

(4) ............................65.83°C/W

3mm × 2mm LDFN (

JC)

(4) ..............................................38.9°C/W

Electrical Characteristics

(6)

VIN = 3.6V, L = 1µH, COUT = 4.7µF, RFRSET = 20.5kΩ, IOUT = 100mA, TA = 25°C, bold values indicate -40°C

≤ TJ ≤ +125°C,

unless otherwise noted..

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

Power Supply

VIN

Supply Voltage Range

2.7

5.5

VSTART

Start-Up Voltage

2.65

2.95

VUVLO

UVLO Threshold (falling)

2.30

2.5

ISTB

Standby Current

VDC = HIGH, boost regulator and LED current

driver both OFF.

230

µA

ISD

Shutdown Current

VDC = 0V

µA

VOVP

Overvoltage Protection (OVP)

Threshold

5.2

5.37

5.55

OVP Hysteresis

OVP Blanking Time

µs

DMAX

Maximum Duty Cycle

ISW

Switch Current Limit

VIN = VOUT = 2.7V

3.5

4.5

5.5

DMIN

Minimum Duty Cycle

6.4

PMOS

Switch On-Resistance

ISW = 100mA

100

Ω

NMOS

ISW = 100mA

ISW

Switch Leakage Current

VDC = 0V, VSW = 5.5V

0.01

µA

FSW

Oscillator Frequency

MHz

Oscillator Frequency Variation

−10

Notes:

Exceeding the absolute maximum rating may damage the device.

The device is not guaranteed to function outside its operating rating.

The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA.

Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.

Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k

Ω in series with 100pF.

Specification for packaged product only.

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