ISL95873 查看數據表（PDF） - Intersil

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ISL95873

Buck PWM Controller with Internal Compensation and External Reference Tracking

Intersil 

ISL95873

Absolute Maximum Ratings

VCC, PVCC, PGOOD, FSEL to GND . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7.0V

VCC, PVCC to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7.0V

GND to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V

EN, VO, REFIN, FB, RTN, OCSET, SREF . . . . . . . . . -0.3V to GND, VCC + 0.3V

BOOT Voltage (VBOOT-GND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 33V

BOOT To PHASE Voltage (VBOOT-PHASE). . . . . . . . . . . . . . . . -0.3V to 7V (DC)

-0.3V to 9V (<10ns)

PHASE Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 28V

GND -8V (<20ns Pulse Width, 10µJ)

UGATE Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . VPHASE - 0.3V (DC) to VBOOT

VPHASE - 5V (<20ns Pulse Width, 10µJ) to VBOOT

LGATE Voltage . . . . . . . . . . . . . . . . . . . . . . . . .GND - 0.3V (DC) to VCC + 0.3V

. . . . . . . . . . . . . . . . . . GND - 2.5V (<20ns Pulse Width, 5µJ) to VCC + 0.3V

Thermal Information

Thermal Resistance (Typical)

θJA (°C/W) θJC (°C/W)

16 Ld UTQFN (Notes 4, 5) . . . . . . . . . . . . . .

90

60

Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . -55°C to +150°C

Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C

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

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

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

Recommended Operating Conditions

Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C

Converter Input Voltage to GND . . . . . . . . . . . . . . . . . . . . . . . . . 3.3V to 25V

VCC, PVCC to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V ±5%

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:

4. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

5. For θJC, the “case temp” location is taken at the package top center.

Electrical Specifications All typical specifications TA = +25°C, VCC = 5V. Boldface limits apply over the operating temperature

range, -10°C to +100°C, unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

MAX

(Note 7) TYP (Note 7) UNIT

VCC and PVCC

VCC Input Bias Current

VCC Shutdown Current

PVCC Shutdown Current

VCC POR THRESHOLD

IVCC

IVCCoff

IPVCCoff

EN = 5V, VCC = 5V, FB = 0.55V, SREF < FB

EN = GND, VCC = 5V

EN = GND, PVCC = 5V

-

1.2

1.9

mA

-

0

1.0

µA

-

0

1.0

µA

Rising VCC POR Threshold Voltage

Falling VCC POR Threshold Voltage

REGULATION

VVCC_THR

VVCC_THF

4.40

4.52

4.60

V

4.10

4.22

4.35

V

System Accuracy

PWM Mode = CCM

-0.5

-

+0.5

%

Internal Reference Voltage

Feedback Voltage Reference Transfer Voltage

-

0.5

-

V

0.461 0.482 0.4975

V

PWM

Switching Frequency Accuracy

VO

VO Input Impedance

VO Reference Offset Current

VO Input Leakage Current

ERROR AMPLIFIER

FSW PWM Mode = CCM

RVO

IVOSS

IVOoff

EN = 5V

VENTHR < EN, SREF = Soft-Start Mode

EN = GND, VO = 3.6V

255

300

345

kHz

-

600

-

kΩ

-

8.5

-

µA

-

0

-

µA

FB Input Bias Current

SREF

IFB EN = 5V, FB = 0.50V

-30

-

+50

nA

Maximum Soft-Start Current

POWER GOOD

PGOOD Pull-down Impedance

ISS SREF = Soft-Start Mode

RPG PGOOD = 5mA Sink

±51

85

±119

µA

-

50

150

Ω

6

FN8390.0

December 10, 2012

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