1MHz, 3A Synchronous Step-Down Switching Voltage Regulator

TJ6713

Nov. 2011 - Preliminary

- 2

-

HTC

Absolute Maximum Ratings

SYMBOL

MIN.

MAX.

UNIT

SYMBOL

MIN.

MAX.

UNIT

VIN, VCC, REF to GND

-0.3

7.0

V

Operating Temp. Range

-40

125

℃

EN, FB to GND

-0.3

VCC+0.3

V

Junction Temp. Range

-40

125

℃

PGND to GND

-0.3

0.3

V

Storage Temp. Range

-65

150

℃

LX current

-3.5

3.5

A

Lead Temperature

(Soldering, 5s)

260

℃

ELECTRICAL CHARACTERISTICS

(Note 1)

Limits in standard typeface are for TJ=25℃. VIN=VCC=5V, PGND=GND, FB in regulation, CREF=100nF, TA=-40°C to +125°C,

unless otherwise noted. Typical values are at TA=+25°C.

PARAMETER

TEST CONDITION

MIN.

TYP.

MAX.

UNIT

Input Voltage Range

2.8

5.5

V

Supply Current

Switching with no load, LX floating

VIN=5.5V

2

5

mA

Shutdown Current

EN=GND

1

5

uA

VCC Undervoltage Lockout

Threshold

When LX starts/stops switching

VCC Rising

2.7

V

VCC Falling

2.6

REF Voltage

IREF=0, VIN=2.8V to 5V

0.8

Output Voltage Range

when using external feedback resistors to drive FB

0.8

VIN*0.9

V

Output Voltage Line Regulation

VIN = 3V to 5V

0.3

%/V

Output Voltage Load Regulation

ILOAD = 0A to 3A

0.6

%/A

FB Regulation Voltage

ILOAD = 0A to 1.5A, VIN = 2.8V to 5.5V

0.784

0.8

0.816

V

FB Input Bias Current

-0.1

0.1

uA

LX On-Resistance, PMOS

VIN = 5V

130

mΩ

LX On-Resistance, NMOS

VIN = 5V

160

mΩ

LX Current-Limit Threshold

Duty cycle = 90%, VIN=2.8V to 5.5V

High side

4.1

4.8

A

Low side

0

A

LX Leakage Current

VIN=5.5V

VLX=5.5V

10

uA

VLX=GND

-10

uA

LX Switching Frequency

VIN = 2.8V to 5.5V

0.85

1

1.15

MHz

LX Maximum Duty Cycle

VFB=GND, LX=High-Z, VIN=2.8V to 5.5V

90

%

LX Minimum Duty Cycle

VFB=VIN, VIN=2.8V to 5.5V

10

%

Output Variation by Temperature

Temp = 25 to 160

3

%

Thermal-Shutdown Threshold

1)

When LX starts/stops switching

TJ rising

160

°

C

TJ falling

145

°

C

EN Enable Threshold

Logic High

1.7

V

Logic Low

1.3

V

Note 1). Guaranteed by design, Not tested