- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄295318 > CM3702-50MS SWITCHED CAPACITOR REGULATOR, DSO10 PDF資料下載
參數(shù)資料
| 型號： | CM3702-50MS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, DSO10 |
| 封裝： | MO-229WEED, TDFN-10 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 298K |
| 代理商： | CM3702-50MS |
2006 California Micro Devices Corp. All rights reserved.
03/20/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
1
CM3702
Low Noise Charge Pump/Linear Regulator LED Driver
Features
Low noise regulator with integrated charge pump
voltage-booster
5V output with input voltage as low as 3.0V
Charge pump can also power external LDO
Low noise in 20Hz to 20kHz audio band
Up to 200mA continuous output current
Low operating and shutdown currents
Stable with low-ESR ceramic or tantalum capaci-
tors
10-lead MSOP package
Lead-free version available
Applications
Backlight white LEDs in wireless handsets and
LCD modules
3.3V to 5V conversion in PCMCIA cards, PCI
Express Cards, other applications needing 5V
5V analog supply for audio codec in notebook
computers, PDAs, MP3 players, etc.
Product Description
The CM3702 low-noise charge pump LDO regulator is
designed to provide accurate and "clean" power to a
subsystem, e.g an LED driver, audio codec or flash
memory. The 5V output provides up to 100mA continu-
ous current for input voltages from 3.0V to 5.5V, and
up to 200mA for a narrower range. This is accom-
plished with an integrated charge pump that boosts the
input voltage before feeding it to an internal LDO linear
regulator. The charge pump is designed to maintain a
nominal 0.8V differential between the input and output
of the LDO regulator. This allows the LDO regulator to
operate with good power supply ripple rejection across
the audio band while maintaining good power effi-
ciency. The charge pump works with two external
capacitors and operates at 250kHz, well outside the
audible frequency band. In addition, separate analog
and digital ground pins are provided for the charge
pump and the rest of the circuitry to eliminate ground
noise feed-through from the charge pump to the regu-
lated output.
The CM3702 is fully protected, offering both overload
current limiting and high temperature thermal shut-
down. (cont’d next page)
Typical Application
Simplified Block Diagram
CM3702
4
3
2
1
6
7
8
9
MSOP-10
5
10
VIN
Ci
10
μF**
CS
3
μF
+
CBYP
0.1
μF
+
VOUT
COUT
0.1
μF
+
CP
+
Enable
** This can be pre-existing system capacitance.
1
μF
CHARGE PUMP
CS
CP-
CP+
CP
CS
CS
DGND
VIN
EN_CHIP
EN_LDO
VREF
LDO
BYP
GND
VOUT
1
2
3
7
6
54
8
9
10
ENABLE CHARGE
PUMP
CONTROL
CIRCUIT
ENABLE LDO
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CM41AH-FREQ | CRYSTAL OSCILLATOR, CLOCK, 0.01 MHz - 69.999 MHz, HCMOS OUTPUT |
| CM43BH-FREQ | CRYSTAL OSCILLATOR, CLOCK, 0.01 MHz - 69.999 MHz, HCMOS OUTPUT |
| CM51FF-FREQ | CRYSTAL OSCILLATOR, CLOCK, 0.01 MHz - 160 MHz, HCMOS OUTPUT |
| CM21FJ-FREQ | CRYSTAL OSCILLATOR, CLOCK, 0.01 MHz - 69.999 MHz, HCMOS OUTPUT |
| CM23AF-FREQ | CRYSTAL OSCILLATOR, CLOCK, 0.01 MHz - 160 MHz, HCMOS OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CM3706 | 制造商:CHAMP 制造商全稱:CHAMP 功能描述:1.5MHz, 600mA Synchronous Step-Down Regulator |
| CM3706A | 制造商:CHAMP 制造商全稱:CHAMP 功能描述:1.5MHz, 600mA Synchronous Step-Down Regulator |
| CM3706AGIM25 | 制造商:CHAMP 制造商全稱:CHAMP 功能描述:1.5MHz, 600mA Synchronous Step-Down Regulator |
| CM3706GIM25 | 制造商:CHAMP 制造商全稱:CHAMP 功能描述:1.5MHz, 600mA Synchronous Step-Down Regulator |
| CM3706IM25 | 制造商:CHAMP 制造商全稱:CHAMP 功能描述:1.5MHz, 600mA Synchronous Step-Down Regulator |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。