TPS62684_16 datasheet(4/27 Pages) TI1

Part #	TPS62684

Description	1600-mA, High-Efficiency Step-Down Converter Optimized for Smallest Solution Size

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Manufacturer	TI1 [Texas Instruments]

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TPS62684

SLVSAC5 – APRIL 2014

www.ti.com

7 Specifications

7.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

(1)

MIN

MAX

UNIT

Voltage at VIN(2)

–0.3

6

VI

Voltage at FB(2)

–0.3

3.6

V

Voltage at SW, EN, AVIN (2)

–0.3

VIN + 0.3

Continuous average output current(3)

890

mA

Peak output current(3)

1600

mA

TJ

Operating junction temperature(4)

-40

150

°C

(1)

Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating

conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2)

All voltage values are with respect to network ground terminal.

(3)

Limit the junction temperature to 105°C.

(4)

In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may

have to be derated. Maximum ambient temperature (TA(max)) is dependent on the maximum operating junction temperature (TJ(max)), the

maximum power dissipation of the device in the application (PD(max)), and the junction-to-ambient thermal resistance of the part/package

in the application (

θJA), as given by the following equation: TA(max)= TJ(max)–(θJA X PD(max)). To achieve full lifetime, it is recommended to

operate the device with a maximum junction temperature of 105°C.

7.2 Handling Ratings

MIN

MAX

UNIT

Tstg

Storage temperature range

–65

150

°C

Human body model

2

kV

ESD rating (1)

Charge device model

1

Machine model

100

V

(1)

The human body model is a 100-pF capacitor discharged through a 1.5-k

Ω resistor into each pin. The machine model is a 200-pF

capacitor discharged directly into each pin.

7.3 Recommended Operating Conditions

MIN

NOM

MAX UNIT

VIN

Input voltage range

3.25

5.5

V

VIN < VOUT,nom + 1V

0

960

IO

Peak output current(1)

mA

VOUT,nom + 1V ≤ VIN ≤ 5.5V

0

1600

CI

Effective Input Capacitance(2)(3)

0.5

µF

L

Effective Inductance

0.3

1.2

µH

CO

Effective Output Capacitance(2)

3.0

5.0

30

µF

TA

Ambient temperature(4)

–40

+85

°C

TJ

Operating junction temperature(5)

–40

+125

°C

(1)

Operating beyond the continuous average output current of 890mA may decrease the lifetime. See the Thermal, Lifetime Information

and Maximum Output Current section.

(2)

Due to the dc bias effect of ceramic capacitors, the effective capacitance is lower than the nominal value when a voltage is applied. The

capacitance is specified to allow the selection of the appropriate capacitor taking into account its dc bias effect.

(3)

Larger values may be required if the source impedance can not support the transient requirements of the load.

(4)

In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may

have to be derated. Maximum ambient temperature (TA(max)) is dependent on the maximum operating junction temperature (TJ(max)), the

maximum power dissipation of the device in the application (PD(max)), and the junction-to-ambient thermal resistance of the part/package

in the application (

θJA), as given by the following equation: TA(max)= TJ(max)–(θJA X PD(max)). To achieve full lifetime, it is recommended to

operate the device with a maximum junction temperature of 105°C.

(5)

Limit the junction temperature to 105°C at 1.6A output current for a lifetime of 25k hours.

4

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