PM6685(2005) データシートの表示（PDF） - STMicroelectronics

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PM6685
(Rev.:2005)

DUAL STEP-DOWN CONTROLLER WITH AUXILARY VOLTAGES FOR NOTEBOOK SYSTEM POWER

STMicroelectronics 

PM6685

Table 6. Electrical characteristics (continued)

Simbol

Parameter

Test Condition

Min. Typ. Max. Unit

Soft Start Ramp time

2

6

ms

ICSENSE Input bias current limit

90 100 110 µA

Comparator offset

VCSENSE - VPGND

-5

5

mV

Zero Crossing Comparatot Offset VPGND - VPHASE

-5

5

mV

Fixed Negative current limit

Threshold

VPGND - VPHASE

-120

mV

OUT5=5V

FSEL to GND

OUT3=3.3V

2083

917

TON ON-Time duration

OUT5=5V

FSEL to VREF

OUT3=3.3V

1390

ns

688

OUT5=5V

FSEL to LDO5

OUT3=3.3V

1040

550

TOFFMIN Minimum OFF-Time

300 350 ns

Voltage Accuracy

4.2V < VLDO5 < 5.5V

1.224 1.237 1.249 V

VREF

Load regulation

Undervoltage Lockout fault

threshold

-100µA < IREF < 100µA

Falling edge of REF

-4

4

mV

0.95 V

COMP

COMP

Over voltage clamp

Under voltage clamp

250

mV

-150

Line regulation

Both SMPS, 6V< VIN <28V

0.004 %/V

VLDO5

LDO5 linear Output Voltage

LDO5 line regulation

6V < VIN < 28V,

0 < ILDO5 < 50mA

6V < VIN < 28V, ILDO5 = 50mA

LDO3_SEL tied to GND

4.9 5.0 5.1

V

0.004 %/V

ILDO5 LDO5 Current limit

VLDO5 > UVLO, ILDO3 = 0A VOUT5

> 5.1V, VOUT3 > 3.34V

300

350

400

mA

UVLO Under Voltage Lockout of LDO5

3.94 4 4.13 V

VLDO3 LDO3 linear Ouput Voltage

0 < ILDO3 < 50mA

3.23 3.3 3.37 V

ILDO3 LDO3 Current limit

VLDO5 > UVLO

130

200 mA

HGATE driver on-resistance

HGATEx high state(pullup)

HGATEx low state (pulldown)

2.0

3

Ω

1.8 2.7 Ω

LGATE driver on-resistance

LGATEx high state(pullup)

LGATEx low state (pulldown)

1.4 2.1 Ω

0.6 0.9 Ω

9/16

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