- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄362556 > AX1928EUB25 SMPS Controller PDF資料下載
參數(shù)資料
| 型號(hào)： | AX1928EUB25 |
| 英文描述： | SMPS Controller |
| 中文描述： | 開關(guān)電源控制器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 303K |
| 代理商： | AX1928EUB25 |
General Description
The MAX1927/MAX1928 800mA step-down converters
power low-voltage microprocessors in compact equip-
ment requiring the highest possible efficiency. The
MAX1927/MAX1928 are optimized for generating low
output voltages (down to 750mV) at high efficiency
using small external components. The supply voltage
range is from 2.6V to 5.5V and the guaranteed minimum
output current is 800mA. 1MHz pulse-width modulation
(PWM) switching allows for small external components.
A unique control scheme minimizes ripple at light loads,
while maintaining a low 140μA quiescent current.
The MAX1927/MAX1928 include a low on-resistance
internal MOSFET switch and synchronous rectifier to
maximize efficiency and minimize external component
count. No external diode is needed. 100% duty-cycle
operation allows for a dropout voltage of only 340mV at
800mA. Other features include internal soft-start,
power-OK (POK) output, and selectable forced PWM
operation for lower noise at all load currents.
The MAX1928 is available with several preset output
voltages: 1.5V (MAX1928-15), 1.8V (MAX1928-18), and
2.5V (MAX1928-25). The MAX1927R has adjustable
output range down to 0.75V. The MAX1927/MAX1928
are available in a tiny 10-pin μMAX package.
Applications
WCDMA Handsets
PDAs and Palmtops
DSP Core Power
Battery-Powered Equipment
Features
o
800mA Output Current
o
Output Voltages from 0.75V to 5V
o
2.6V to 5.5V Input Voltage Range
o
Power-OK Output
o
No Schottky Diode Required
o
Selectable Forced PWM Operation
o
1MHz Fixed-Frequency PWM Operation
o
140μA Quiescent Current
o
Soft-Start
o
10-Pin μMAX Package
M
Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Ordering Information
BATT
COMP
GND
REF
PGND
LX
POK
FB
V
2.6V TO 5.5V
C1
C2
C
C
R
C
L1
V
0.75V AT 800mA
SHDN
PWM
MAX1927R
C
f
Typical Operating Circuit
19-2527; Rev 0; 7/02
PART
PRESET
OUTPUT
VOLTAGE
Adj. to 0.75V -40
°
C to +85
°
C 10 μMAX
1.5V
-40
°
C to +85
°
C 10 μMAX
1.8V
-40
°
C to +85
°
C 10 μMAX
2.5V
-40
°
C to +85
°
C 10 μMAX
TEMP
RANGE
PIN-
PACKAGE
MAX1927
REUB
MAX1928
EUB15
MAX1928EUB18
MAX1928EUB25
1
2
3
4
5
10
9
8
7
6
POK
BATT
LX
PGND
FB
REF
GND
PWM
MAX1927R
MAX1928
μ
MAX
TOP VIEW
COMP
SHDN
Pin Configuration
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AXDA1700DKT3C | Microprocessor |
| AXDA1700DKV3C | Microprocessor |
| AXDA1700DLT3C | Microprocessor |
| AXDA1700DLT3D | Microprocessor |
| AXDA1700DLV3C | Microprocessor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ax1b-10a | 制造商:SAN-O 功能描述: |
| AX1B-2AMP | 制造商:MISCELLANEOUS 功能描述: |
| AX-1MC-01 | 制造商:Carlo Gavazzi 功能描述:SIDE AUX 1NC MINI CC |
| AX-1MF-10 | 制造商:Carlo Gavazzi 功能描述:SIDE AUX 1NO MINI FAST-ON |
| AX-1MS-10 | 制造商:Carlo Gavazzi 功能描述:SIDE AUX 1NO MINI SC |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。