データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

MCP1252 データシート(PDF) 9 Page - Microchip Technology

部品番号 MCP1252
部品情報  Low-Noise, Positive-Regulated Charge Pump
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1252 データシート(HTML) 9 Page - Microchip Technology

Back Button MCP1252_14 Datasheet HTML 5Page - Microchip Technology MCP1252_14 Datasheet HTML 6Page - Microchip Technology MCP1252_14 Datasheet HTML 7Page - Microchip Technology MCP1252_14 Datasheet HTML 8Page - Microchip Technology MCP1252_14 Datasheet HTML 9Page - Microchip Technology MCP1252_14 Datasheet HTML 10Page - Microchip Technology MCP1252_14 Datasheet HTML 11Page - Microchip Technology MCP1252_14 Datasheet HTML 12Page - Microchip Technology MCP1252_14 Datasheet HTML 13Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 20 page
background image
 2002-2014 Microchip Technology Inc.
DS20001752C-page 9
MCP1252/3
4.0
DEVICE OVERVIEW
4.1
Theory of Operation
The MCP1252 and MCP1253 family of devices employ
a switched capacitor charge pump to buck or boost an
input supply voltage (VIN) to a regulated output voltage.
Referring to the Functional Block Diagram and
Figure 4-1, the devices perform conversion and
regulation in three phases. When the devices are not in
shutdown mode and a steady-state condition has been
reached, the three phases are continuously cycled
through. The first phase transfers charge from the input
to the flying capacitor (CFLY) connected to pins C+ and
C-. This phase always occurs for half of the internal
oscillator period. During this phase, switches S1 and S2
are closed.
Once the first phase is complete, all switches are
opened and the second phase (idle phase) is entered.
The device compares the internal or external feedback
voltage with an internal reference. If the feedback volt-
age is below the regulation point, the device transitions
to the third phase.
The third phase transfers energy from the flying capac-
itor to the output capacitor connected to VOUT and the
load. If regulation is maintained, the device returns to
the idle phase. If the charge transfer occurs for half the
internal oscillator period, more charge is needed in the
flying capacitor and the device transitions back to the
first phase.
The regulation control is hysteretic, otherwise referred
to as a bang-bang control. The output is regulated
around a fixed reference with some hysteresis. As a
result, typically 50 mV of peak-to-peak ripple will be
observed at the output independent of load current.
The frequency of the output ripple, however, will be
influenced heavily by the load current and output
capacitance. The maximum frequency that will be
observed is equal to the internal oscillator frequency.
The devices automatically transition between buck or
boost operation. This provides a low-cost, compact and
simple
solution
for
step-down/step-up
DC/DC
conversion. This is especially true for battery-operated
applications that require a fixed output above or below
the input.
FIGURE 4-1:
Flow Algorithm.
START
PHASE 1:
Charge Transfer
From VIN to CFLY
PHASE 2:
Idle State
VFB > VREF
PHASE 3:
Charge Transfer
From CFLY to COUT
No
Yes
No
Yes
Yes
No
No
Yes
VFB > VREF
t
1
1
2FOSC
----------------
=
t
3
1
2FOSC
----------------
=


同様の部品番号 - MCP1252_14

メーカー部品番号データシート部品情報
logo
Microchip Technology
MCP1252 MICROCHIP-MCP1252_13 Datasheet
395Kb / 20P
   Low Noise, Positive-Regulated Charge Pump
11/29/12
More results

同様の説明 - MCP1252_14

メーカー部品番号データシート部品情報
logo
Microchip Technology
MCP1253 MICROCHIP-MCP1253 Datasheet
440Kb / 18P
   Low Noise, Positive-Regulated Charge Pump
2002
MCP1252 MICROCHIP-MCP1252_13 Datasheet
395Kb / 20P
   Low Noise, Positive-Regulated Charge Pump
11/29/12
logo
ON Semiconductor
CAT3200HU2 ONSEMI-CAT3200HU2_14 Datasheet
129Kb / 9P
   Low Noise Regulated Charge Pump DC-DC Converter
September, 2014 ??Rev. 5
logo
SHOUDING Shouding Semic...
SD6210A SHOUDING-SD6210A Datasheet
1Mb / 7P
   Low Noise Regulated Charge Pump DC/DC Converter
logo
Unisonic Technologies
L5200 UTC-L5200_15 Datasheet
403Kb / 7P
   LOW NOISE, REGULATED CHARGE PUMP DC/DC CONVERTERS
L5200 UTC-L5200 Datasheet
159Kb / 7P
   LOW NOISE, REGULATED CHARGE PUMP DC/DC CONVERTERS
L5200 UTC-L5200_16 Datasheet
401Kb / 7P
   LOW NOISE, REGULATED CHARGE PUMP DC/DC CONVERTERS
logo
ON Semiconductor
CAT3200 ONSEMI-CAT3200 Datasheet
196Kb / 12P
   Low Noise Regulated Charge Pump DC-DC Converter
May, 2010 ??Rev. 13
logo
Unisonic Technologies
L5201 UTC-L5201 Datasheet
169Kb / 7P
   LOW NOISE, REGULATED CHARGE PUMP DC/DC CONVERTERS
logo
HEXIN SEMICONDUCTOR.
HX4004A HEXIN-HX4004A Datasheet
225Kb / 9P
   Low Noise, Regulated Charge Pump DC/DC Converter
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com