MCP1662T-ESLASHMN datasheet(4/28 Pages) MICROCHIP

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MCP1662

DS20005316E-page 4

 2014-2015 Microchip Technology Inc.

EN Input Logic Low

VIL

——

7.5

% of VIN

EN Input Leakage Current

IENLK

—0.025

—

µA

VEN =5V

Start-up Time

tSS

—

100

—

µs

EN Low-to-High,

90% of ILED

(Note 2, Figure 2-10)

Thermal Shutdown

Die Temperature

TSD

—150

—

°C

Die Temperature Hysteresis

TSDHYS

—15

—

°C

TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise specified, all limits apply for typical values at ambient temperature

TA =+25°C, VIN = 3.0V, IOUT =20mA, VOUT =12V, CIN =COUT = 10 µF, X7R ceramic, L = 4.7 µH.

Boldface specifications apply over the air-forced TA range of -40°C to +125°C.

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Temperature Ranges

Operating Junction Temperature

Range

-40

—

+125

°C

Steady State

Storage Temperature Range

-65

—

+150

°C

Maximum Junction Temperature

—

+150

°C

Transient

Package Thermal Resistances

Thermal Resistance, 5L-SOT-23



—201.0

—

°C/W

Thermal Resistance, 8L 2x3 TDFN



—52.5

—

°C/W

DC AND AC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all limits apply for typical values at ambient temperature

TA =+25°C, VIN = 3.3V, VOUT = 9V or 3 white LEDs (VF = 2.75V @ IF =20 mA or VF =3.1V @ IF =100 mA),

ILED =20 mA, CIN =COUT =10µF, X7R ceramic, L= 4.7µH.

Boldface specifications apply over the controlled TA range of -40°C to +125°C.

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Note 1:

Minimum input voltage in the range of VIN (VIN <5.5V < VOUT) depends on the maximum duty cycle

(DCMAX) and on the output voltage (VOUT), according to the boost converter equation:

VINmin =VOUT x(1– DCMAX). Output voltage is equal to the LED voltage plus the voltage on the sense

resistor (VOUT = VLED +V_RSET).

Determined by characterization, not production tested.

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