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| 型号： | MAX5026EUT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 40MA SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 3 V ~ 36 V |
| 输入电压： | 3 V ~ 11 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 40mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 包装： | 标准包装 |
| 供应商设备封装： | SOT-6 |
| 产品目录页面： | 1411 (CN2011-ZH PDF) |
| 其它名称： | MAX5026EUT+TDKR |
19-2239; Rev 2; 3/09
ATION
EVALU
AVAILA
KIT
BLE
500kHz, 36V Output, SOT23,
PWM Step-Up DC-DC Converters
General Description
The MAX5025–MAX5028 constant-frequency, pulse-
width modulating (PWM), low-noise boost converters
are intended for low-voltage systems that often need a
locally generated high voltage. These devices are
capable of generating low-noise, high output voltages
required for varactor diode biasing in TV tuners, set-top
boxes, and PCI cable modems. The MAX5025 –
MAX5028 operate from as low as 3V and switch at
500kHz.
The constant-frequency, current-mode PWM architec-
ture provides for low output noise that is easy to filter. A
40V lateral DMOS device is used as the internal power
switch, making the devices ideal for boost converters
up to 36V. The MAX5025/MAX5026 adjustable versions
require the use of external feedback resistors to set the
output voltage. The MAX5027/MAX5028 offer a fixed
30V output. These devices are available in a small, 6-
pin SOT23 package.
Applications
TV Tuner Power Supply
Low-Noise Varactor Diode Biasing
Features
? Input Voltage Range:
3V to 11V (MAX5026/MAX5028)
4.5V to 11V (MAX5025/MAX5027)
? Wide Output Voltage Range: V CC to 36V
? Output Power: 120mW (max)
? User-Adjustable Output Voltage with
MAX5025/MAX5026 Using External Feedback
Resistors
? Fixed 30V Output Voltage: MAX5027/MAX5028
? Internal 1.3Ω (typ), 40V Switch
? Constant PWM Frequency Provides Easy Filtering
in Low-Noise Applications
? 500kHz (typ) Switching Frequency
? 1μA (max) Shutdown Current
? Small, 6-Pin SOT23 Package
Ordering Information
Set-Top Box Tuner Power Supply
PCI Cable Modem
Voice-Over-Cable
LCD Power Supply
Avalanche Photodiode Biasing
PART
MAX5025 EUT-T
MAX5026 EUT-T
MAX5027 EUT-T
MAX5028 EUT-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
Typical Operating Circuit
Selector Guide appears at end of data sheet.
V CC = 4.5V TO 11V
L1
(MAX5027)
V CC = 3V TO 11V
(MAX5028)
V CC
LX
D1
V OUT
30V
Pin Configuration
MAX5027
MAX5028
TOP VIEW
C1
SHDN
PGND
FB
C2
PGND 1
GND 2
MAX5025–
MAX5028
6
5
LX
V CC
GND
FB 3
SOT23-6
4
SHDN
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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