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ISL8022

Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Renesas Electronics 

ISL8022

Electrical Specifications Unless otherwise noted, all parameter limits are established over the recommended operating

conditions: TA = -40°C to +85°C, VIN = 2.8V to 5.5V, EN1 = EN2 = VIN, SYNC = 0V, L = 1.2µH, C1 = 2 x 10µF, C2 = C4 = 22µF, IOUT1 = 0A to 2A,

IOUT2 = 0A to 1.7A. (Typical values are at TA = +25°C, VIN = 3.6V). Boldface limits apply over the operating temperature range, -40°C to +85°C.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

MAX

(Note 6) TYP (Note 6)

UNITS

Negative Current Limit

LX1, LX2

P-Channel MOSFET ON-Resistance

N-Channel MOSFET ON-Resistance

LX_ Maximum Duty Cycle

Ivalley1

Ivalley2

VIN = 5.5V, IO = 200mA Channel 1

VIN = 5.5V, IO = 200mA Channel 2

VIN = 5.5V, IO = 200mA Channel 1

VIN = 5.5V, IO = 200mA Channel 2

-2.2

-1.6

-1

A

-2.2

-1.6

-1

A

90

115

m

100

125

m

80

103

m

90

112

m

100



PWM Switching Frequency

Synchronization Range

FS

(Note 7)

1.8

2.25

2.7

MHz

5.4

8

MHz

Channel 1 to Channel 2 Phase Shift

Rising edge to rising edge timing

180

°

LX Minimum On Time

SYNC = High (forced PWM mode)

65

ns

Soft Discharge Resistance

PG

RDIS_ EN = LOW

80

100

130



Output Low Voltage

Sinking 1mA, VFB = 0.5V

0.4

V

PG Pin Leakage Current

PG Pull-up Resistor

PG = VIN = 3.6V

0.01

0.1

µA

1

M

Internal PGOOD Low Rising Threshold

Percentage of nominal regulation voltage

85

91

97

%

Internal PGOOD Low Falling Threshold

Percentage of nominal regulation voltage

78

85

92

%

Delay Time (Rising Edge)

0.76

ms

Internal PGOOD Delay Time (Falling Edge)

2

4

µs

EN1, EN2, SYNC

Logic Input Low

0.4

V

Logic Input High

1.4

V

SYNC Logic Input Leakage Current

Enable Logic Input Leakage Current

Thermal Shutdown

ISYNC

IEN_

Pulled up to 5.5V

0.1

1

µA

0.1

1

µA

150

°C

Thermal Shutdown Hysteresis

25

°C

NOTES:

6. 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.

7. The operational frequency per switching channel will be half of the SYNC frequency.

FN7650 Rev 3.00

March 14, 2013

Page 6 of 18

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