ISL8510IRZ View Datasheet(PDF) - Intersil

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Description

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ISL8510IRZ

Dual Output Controller with 1A Standard Buck PWM and LDO

Intersil 

ISL8510

Electrical Specifications

Unless Otherwise Noted, Typical Specifications are Measured at the Following Conditions: TA = +25°C,

VIN = 6V to 25V. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified.

Temperature limits established by characterization and are not production tested. (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNITS

ENABLE SECTION

EN_PWM Threshold

Rising Edge

1.2 1.7 2.2

V

Hysteresis

350

mV

EN_LDO Logic Input Threshold

Rising Edge

1.2 1.7 2.2

V

Hysteresis

400

mV

EN_LDO Logic Input Current

-1

1

µA

FAULT PROTECTION

Thermal Shutdown Temperature

PWM UV Trip Level

PWM UVP Propagation Delay

TSD

THYS

VUV

Rising Threshold

Hysteresis

Referred to Nominal VOUT

150

°C

15

°C

65

70

75

%

360

ns

PWM OCP Threshold

(Note 5)

1.85 2.70 3.00

A

OCP Blanking Time

150

ns

POWER-GOOD

PG_PWM Trip Level Referred to Nominal

VOUT

Falling Edge, 15mV Hysteresis

Rising Edge, 15mV Hysteresis

84

88

92

%

107 110 113

%

PG_PWM and PG_LDO Propagation Delay

160

ns

PG_PWM Low Voltage

ISINK = 4mA

0.3

V

PG_PWM Leakage Current

PG_LDO Trip Level Referred to Nominal

VOUT

VPG_PWM = 5.5V, VFB_PWM = 0.6V

Lower Level, Falling Edge, 15mV Hysteresis

-1

1

µA

81

85

88

%

PG_LDO Low Voltage

ISINK = 4mA

0.3

V

PG_LDO Leakage Current

SOFT-START SECTION

VPG_LDO = 5V, VFB_LDO = 600mV

-1

1

µA

Soft-Start Threshold

0.8 1.0 1.2

V

Soft-Start Threshold to Enable PG

2.8 2.95 3.1

V

Soft-Start Voltage High

3.3

V

Soft-Start Charging Current

25

30

35

µA

Soft-Start Pull-down

POWER MOSFET

VSS = 3.0V

25

mA

rDS(ON)

LDO

IOUT = 100mA

120 350 mΩ

FB_LDO Voltage Accuracy

FB Leakage Current

Output Current Limit

IOUT = 10mA

VFB = 0V

-1.5

1.5

%

-200 -80

nA

550 800 1000 mA

Dropout Voltage

IOUT = 450mA, VOUT >2V (Note 6)

150 300 mV

FB_LDO Line Regulation

IOUT = 0mA, VIN_LDO = 2.0V ~ 4.6V

-0.6

0.6 %/V

FB_LDO Load Regulation

IOUT = 10mA to 500mA

±0.5

%

NOTES:

4. Test Condition: VIN = 15V, FB forced above regulation point (0.6V), no switching, and power MOSFET gate charging current not included.

5. Limits established by characterization and are not production tested.

6. The dropout voltage is defined as minimum amount VIN must exceed a desired VOUT operating point. VLDO = VIN_LDO - VOUT.

7. The input voltage VCC must be higher than VIN_LDO or the LDO will not function.

7

FN6516.2

December 15, 2008

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