MIC2800
Digital Power Management IC
2MHz, 600mA DC/DC w/Dual
300mA/300mA Low V
IN
LDOs
LOWQ is a registered trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. " 2180 Fortune Drive " San Jose, CA 95131 " USA " tel +1 (408) 944-0800 " fax + 1 (408) 474-1000 " http://www.micrel.com
September 2007
M9999-090507-C
General Description
The MIC2800 is a high performance power management
IC, giving three output voltages with maximum efficiency.
Integrating a 2MHz DC/DC converter with an LDO post
regulator, the MIC2800 gives two high efficiency outputs
with a second, 300mA LDO for maximum flexibility. The
MIC2800 features a LOWQ
?/DIV>
mode, reducing the total
current draw while in this mode to less than 30礎. In
LOWQ
?/DIV>
mode, the output noise of the DC to DC converter
is 75礦
RMS
, significantly lower than other converters which
use a PFM light load mode that can interfere with sensitive
RF circuitry.
The DC to DC converter uses small values of L and C to
reduce board space but still retains efficiencies over 90%
at load currents up to 600mA.
The MIC2800 is a 礐ap design, operating with very small
ceramic output capacitors and inductors for stability,
reducing required board space and component cost and it
is available in fixed output voltages in the 16-pin
3mm x 3mm MLF
?/DIV>
leadless package.
Data sheets and support documentation can be found on
Micrels web site at: www.micrel.com.
Features
" 2.7V to 5.5V input voltage range
" 2MHz DC/DC converter and two stand-alone LDOs
  LDO1: Low input voltage is powered directly from
DC/DC converter for highest efficiency
" Integrated power-on reset (OR function for all outputs)
  Adjustable delay time
" LOWQ
?/DIV>
mode
  30礎 Total I
Q
when in LOWQ
?/DIV>
mode
" Tiny 16-pin 3mm x 3mm MLF
?/DIV>
package
DC to DC Converter
" Output current to 600mA in PWM mode
" LOWQ
?/DIV>
Mode: NO NOISE Light load mode
  75礦
RMS
output noise in LOWQ
?/DIV>
mode
" 2MHz PWM operation in normal mode
" >90% efficiency
LDOs
" LDO1 input voltage directly connected to DC/DC
converter output voltage for maximum efficiency
  Ideal for 1.8V to 1.5V conversion
  300mA output current from 1.8V input
  Output voltage down to 0.8V
" LDO2 300mA output current capable
" Thermal Shutdown Protection
" Current Limit Protection
Applications
" Mobile phones
" PDAs
" GPS receivers
" Digital still cameras
" Portable media players
Typical Application
LDO
VIN
VIN
SW
FB
LDO1
LDO2
POR
C
SET
LOWQ
EN2
C
BYP
C
BIAS
EN1
MIC2800-xxxYML
Baseband
Memory/DSP
PGND   SGND
V
IN
2.7V to 5.5V
4.7礔/
6.3V
C
BYP
0.01礔
C
OUT2
2.2礔
ceramic
C
OUT1
2.2礔
ceramic
C
SET
0.01礔
C
BIAS
0.1礔
2.2礔
ceramic
V
OUT
2.2礖
GND
GND
100 200 300 400 500 600
OUTPUT CURRENT (mA)
50
55
60
65
70
75
80
85
90
95
100
DC/DC 1.8V
OUT
Efficiency
0
3V
3.6V
4.2V
L = 2.2礖
C
OUT
= 2.2礔
/LowQ = V
IN
相關代理商/技術參數 |
參數描述 |
MIC2800-GFSYML TR |
功能描述:線性穩壓器 - 標準 DC-DC + 2 Linear Regulators with LowQ Mode (Lead Free)
RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
MIC280-0YM6 |
制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
MIC280-0YM6 TR |
功能描述:板上安裝溫度傳感器 12-bit Local and Remote +/-4% -55 C to +125 C I2C Temperature Sensor in SOT23-6
RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
MIC280-0YM6-TR |
功能描述:SENSOR TEMPERATURE SMBUS SOT23-6 制造商:microchip technology 系列:IttyBitty? 包裝:剪切帶(CT) 零件狀態:有效 傳感器類型:數字,本地/遠程 檢測溫度 - 本地:-55°C ~ 125°C 檢測溫度 - 遠程:-55°C ~ 125°C 輸出類型:SMBus 電壓 - 電源:3 V ~ 3.6 V 分辨率:7 b(本地),11 b(遠程) 特性:輸出開關,可編程分辨率,關斷模式 精度 - 最高(最低):±2°C(±2.5°C) 測試條件:0°C ~ 100°C(-55°C ~ 125°C) 工作溫度:-55°C ~ 125°C 封裝/外殼:SOT-23-6 供應商器件封裝:SOT-23-6 標準包裝:1 |
MIC280-1BM6 |
制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
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