12V/5V Input Buck PWM Controller

2

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ABSOLUTE MAXIMUM RATINGS

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 in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

IN to AGND.............................................................-0.3V to +24V

BST to AGND..........................................................-0.3V to +30V

BST to LX..................................................................-0.3V to +6V

REG, DREG, PUVLO, DCENI, SYNCIN, THRESH,

SENSE to AGND....................................................-0.3V to +6V

RT, ILIM, STARTUP, PGOOD, FB, CS+ to AGND ....-0.3V to +6V

PGND to AGND .....................................................-0.3V to +0.3V

Input Current (any pin) .....................................................±50mA

32-Pin TQFN (derate 34.5 mW/°C above +70°C) .2758.6mW

32-Pin TQFN (

32-Pin TQFN (

Operating Ambient Temperature Range .............-40°C to +85°C

Maximum Junction Temperature .....................................+150°C

Storage Temperature Range .............................-60°C to +150°C

Lead Temperature (soldering, 10s) ......…………………..+300°C

ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

816

Input-Voltage Range

4.5

5.5

V

Standby Supply Current

0.3

0.5

mA

Quiescent Supply Current

1.6

2.6

mA

Switching Supply Current

5.0

8.0

mA

PWM UVLO

Default PWM Undervoltage

Lockout Threshold

6.7

7.3

V

PWM Undervoltage Lockout

Hysteresis

0.7

V

PUVLO Threshold

1.202

1.220

1.238

V

PUVLO Hysteresis

122

mV

PUVLO Input Impedance

180

310

500

k

Ω

PWM DCENI CONTROL

DCENI Comparator Input

Common-Mode Range

03

V

DCENI Comparator Offset

-10

+10

mV

DCENI Comparator Hysteresis

100

mV

DCENI Input Current

-1

+1

µA

THRESH Operating Voltage

Range

0.6

2.5

V

-1.5

+1

THRESH Input Current

-5

+1

µA

Default DCENI Threshold

1.202

1.22

1.238

V