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ISL80121IR50Z-T

1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting

Intersil 

ISL80121-5

Absolute Maximum Ratings (Note 7)

VIN Relative to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V

VOUT Relative to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V

PG, ENABLE, SENSE, SS, ISET

Relative to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V

ESD Rating

Human Body Model (Tested per JESD22-A114) . . . . . . . . . . . . . . . .2.5kV

Machine Model (Tested per JESD22-A115). . . . . . . . . . . . . . . . . . . 250V

Latch Up (Tested per JESD78). . . . . . . . . . . . . . . . . . . . . . .±100mA @ 85°C

Thermal Information

Thermal Resistance (Typical)

θJA (°C/W) θJC (°C/W)

10 Ld 3x3 DFN Package (Notes 5, 6). . . . .

48

7

Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . .+150°C

Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C

Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

Recommended Operating Conditions (Note 8)

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

VIN Relative to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.2V to 6V

VOUT Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mV to 5V

PG, ENABLE, SENSE, SS, ISET Relative to GND . . . . . . . . . . . . . . . . 0V to 6V

PG Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product

reliability and result in failures not covered by warranty.

NOTES:

5. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech

Brief TB379.

6. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.

7. Absolute maximum voltage rating is defined as the voltage applied for a lifetime average duty cycle above 6V of 1%.

8. Electromigration specification defined as lifetime average junction temperature of +110°C where max rated DC current = lifetime average current.

Electrical Specifications Unless otherwise noted, all parameters are established over the following specified conditions:

VIN = VOUT + 0.4V, VOUT = 5.0V, CIN = COUT = 10µF, TJ = +25°C, ILOAD = 0A. Applications must follow thermal guidelines of the package to

determine worst case junction temperature. Please refer to “Functional Description” on page 7 and Tech Brief TB379.

Boldface limits apply over the operating temperature range, -40°C to +125°C. Pulse load techniques used by ATE to ensure TJ = TA defines

established limits.

PARAMETER

DC CHARACTERISTICS

SYMBOL

TEST CONDITIONS

MIN

MAX

(Note 9) TYP (Note 9)

UNITS

DC Output Voltage Accuracy

VOUT

VOUT + 0.4V < VIN < 6V; 0A < ILOAD < 1A

-1.8

1.8

%

DC Input Line Regulation

ΔVOUT/ΔVIN VOUT + 0.4V < VIN < 6.0V, VOUT = 5.0V

1

%

DC Output Load Regulation

ΔVOUT

0A < ILOAD < 1A

-1

%

Ground Pin Current

IQ

ILOAD = 0A, 2.2V < VIN < 6V

3

5

mA

ILOAD = 1A, 2.2V < VIN < 6V

5

7

mA

Ground Pin Current in Shutdown

ISHDN

ENABLE = 0.2V, VIN = 6V

0.2

12

µA

Dropout Voltage (Note 10)

VDO

ILOAD = 1A, VIN = 5.0V, VSENSE = 0V

90

130

mV

Output Current Limit

ILIMIT

VOUT = 4.75V, VOUT + 0.4V < VIN < 6V, ISET is floating 0.66 0.75 0.84

A

VOUT = 4.75V, VOUT + 0.4V < VIN < 6V, RSET = 19.33kΩ

0.9

A

Thermal Shutdown Temperature

TSD

VOUT + 0.4V < VIN < 6V

160

°C

Thermal Shutdown Hysteresis

(Rising Threshold)

TSDn

VOUT + 0.4V < VIN < 6V

30

°C

AC CHARACTERISTICS

Input Supply Ripple Rejection

Output Noise Voltage

ENABLE PIN CHARACTERISTICS

PSRR

f = 1kHz, ILOAD = 1A

f = 1kHz, ILOAD = 100mA

ILOAD = 10mA, BW = 10Hz < f < 100kHz

40

dB

40

dB

210

µVRMS

Turn-on Threshold

Hysteresis (Rising Threshold)

VEN(HIGH)

VEN(HYS)

2.2V < VIN < 6V

2.2V < VIN < 6V

0.3

0.8

1.0

V

10

80

200

mV

4

FN7713.4

September 29, 2011

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