88PG8237A1-NFE1C000 参数 Datasheet PDF下载

List of Figures

List of Figures

Figure 1:

Typical Application Circuit: Output 1.8V/1.5A and 1.2V/1.5A .............................................................3

1

Signal Description ........................................................................................................................... 11

Figure 2:

88PG82XX Family 3X4mm QFN-20 Package—Top View................................................................11

2

3

Electrical Specifications ................................................................................................................. 15

Functional Description.................................................................................................................... 19

Figure 3:

Figure 4:

Figure 5:

Figure 6:

Figure 7:

Figure 8:

Figure 9:

Figure 10:

Figure 11:

Figure 12:

Figure 13:

Figure 14:

Figure 15:

88PG82XX Block Diagram ...............................................................................................................19

Output Voltage Window ....................................................................................................................20

Startup without Sequencing ..............................................................................................................20

Startup with Sequencing and Soft Start (C

OUT

= 22

μF)

...................................................................20

Fast Startup (0.8V, 1.2V, 1.8V, 2.5V, 3.3V)

.................................................................................21

Soft Start up (0.8V, 1.2V, 1.8V, 2.5V, 3.3V) .....................................................................................21

Inrush Current with C

OUT

= 100

μF

..................................................................................................21

Serial Programmability......................................................................................................................23

Startup Sequence ............................................................................................................................27

VSET = 2.5V and PSET = -5% .........................................................................................................27

UVLO and OVP Waveforms .............................................................................................................28

Power-On Reset Waveforms ............................................................................................................28

Adaptive Transient Response ..........................................................................................................29

4

Functional Characteristics.............................................................................................................. 31

Figure 16:

Figure 17:

Figure 18:

Figure 19:

Figure 20:

Figure 21:

Figure 22:

Figure 23:

Figure 24:

Figure 25:

Figure 26:

Figure 27:

Figure 28:

Figure 29:

Figure 30:

Figure 31:

Figure 32:

Figure 33:

Startup Using the Enable Pin ...........................................................................................................31

Turn Off Using the Enable Pin ..........................................................................................................31

Startup Sequence ............................................................................................................................31

Hot Plug ............................................................................................................................................31

UVLO and OVP Thresholds..............................................................................................................32

Input Soft Start and Start up Sequence ............................................................................................32

Step-Down Short-Circuit Response .................................................................................................32

Switching Waveforms - PWM mode ................................................................................................33

Switching Waveforms - PWM mode .................................................................................................33

Switching Waveforms - DCM Mode .................................................................................................33

Switching Waveforms - DCM Mode-Zoom........................................................................................33

PWM Output Ripple Voltage ............................................................................................................34

Fast Load Rise Time ........................................................................................................................34

Slow Load Rise Time ........................................................................................................................34

Fast Load Fall Time .........................................................................................................................35

Slow Load Fall Time .........................................................................................................................35

Load Transient Response ................................................................................................................35

Double-Pulsed Load Response ........................................................................................................35

Copyright © 2008 Marvell

April 23, 2008, 2.00

Document Classification: Proprietary Information

Doc. No. MV-S103563-00 Rev. C

Page 9