PM6681A 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

比赛名单

PM6681A

Dual synchronous step-down controller with adjustable LDO

STMicroelectronics 

PM6681A

Electrical characteristics

Table 6.

Electrical characteristics

(VIN = 24 V; TJ = 25 °C, unless otherwise specified) (continued)

Symbol

Parameter

Test condition

Min Typ

Max Unit

On time pulse width

Ton

On time duration_

@VIN = 24 V

FSEL to GND

OUT1 = 3.3 V

OUT2 = 1.8 V

FSEL to VREF

OUT1 = 3.3 V

OUT2 = 1.8 V

FSEL to LDO5

OUT1 = 3.3 V

OUT2 =1.8 V

575

680

785

195

230

265

390

460

530

ns

145

175

205

285

340

395

110

135

160

OFF time

TOFFMIN

Minimum off time

@VIN = 24 V

350

500

ns

Voltage reference

VREF

Voltage accuracy

Load regulation

Undervoltage lockout fault

threshold

4 V < VLDO5 < 5.5 V

-100 µA< IREF < 100 µA

Falling edge of REF

1.224 1.236 1.249 V

-4

4

mV

0.95 mV

Integrator

FB

FB

COMP

COMP

Voltage accuracy

Input bias current

Over voltage clamp

Under voltage clamp

(1)

Normal mode

+891

+909 mV

0.1

µA

250

mV

-150

Line regulation

Both SMPS, 6 V < Vin < 36 V (1)

1

%

LDO5 linear regulator

VLDO5

ILDO5

ULVO

LDO5 linear output voltage

LDO5 line regulation

LDO5 current limit

Under voltage lockout of

LDO5

6 V < VIN < 36 V,

0 < ILDO5 < 50 mA

6 V < VIN < 36 V, ILDO5 = 20 mA ,

VLDO5 > UVLO

4.9

270

3.94

5.0

5.1

V

0.004 %/V

330

400 mA

4

4.13

V

LDO linear regulator

VLDO

LDO linear output voltage

4.5 V< V5SW < 5.5 V

0.5 mA < ILDO < 50 mA

LDO FB connected to LDO

0.887 0.905 0.923 V

11/47

Share Link: