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| 型号： | MAX5090CATE/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 16WQFN |
| 产品变化通告： | Product Discontinuation 28/Nov/2011 |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.27 V ~ 11 V |
| 输入电压： | 6.5 V ~ 76 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 127kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
19-3872; Rev 0; 3/06
ATION
EVALU
AVAILA
KIT
BLE
2A, 76V, High-Efficiency
MAXPower Step-Down DC-DC Converters
General Description
The MAX5090A/B/C easy-to-use, high-efficiency, high-
voltage step-down DC-DC converters operate from an
input voltage up to 76V, and consume only 310μA qui-
escent current at no load. This pulse-width-modulated
(PWM) converter operates at a fixed 127kHz switching
frequency at heavy loads, and automatically switches
to pulse-skipping mode to provide low quiescent cur-
rent and high efficiency at light loads. The MAX5090
includes internal frequency compensation simplifying
circuit implementation. The device can also be syn-
Features
? Wide Input Voltage Range: 6.5V to 76V
? Fixed (3.3V, 5V) and Adjustable (1.265V to 11V)
Output-Voltage Versions
? 2A Output Current
? Efficiency Up to 92%
? Internal 0.26 ? High-Side DMOS FET
? 310μA Quiescent Current at No Load
? 19μA Shutdown Current
chronized with external system clock frequency in a
noise-sensitive application. The MAX5090 uses an
internal low on-resistance and a high-voltage DMOS
transistor to obtain high efficiency and reduce overall
?
?
?
Internal Frequency Compensation
Fixed 127kHz Switching Frequency
External Frequency Synchronization
system cost. This device includes undervoltage lock-
out, cycle-by-cycle current limit, hiccup-mode output
short-circuit protection, and overtemperature shutdown.
The MAX5090 delivers up to 2A output current. External
shutdown is included, featuring 19μA (typ) shutdown
current. The MAX5090A/MAX5090B versions have fixed
output voltages of 3.3V and 5V, respectively, while the
? Thermal Shutdown and Short-Circuit Current Limit
? -40°C to +125°C Automotive Temperature Range
? 16-Pin (5mm x 5mm) Thin QFN Package
? Capable of Dissipating 2.67W at +70°C
Ordering Information
MAX5090C features an adjustable 1.265V to 11V output
voltage.
The MAX5090 is available in a space-saving 16-pin thin
PART
TEMP
RANGE
PIN-
PACKAGE*
OUTPUT
VOLTAGE
(V)
QFN package (5mm x 5mm) and operates over the
automotive temperature range (-40°C to +125°C).
MAX5090A ATE+ -40°C to +125°C 16 TQFN-EP**
3.3
Applications
MAX5090AATE
-40°C to +125°C 16 TQFN-EP**
3.3
Automotive
Industrial
Distributed Power
MAX5090B ATE+ -40°C to +125°C 16 TQFN-EP**
MAX5090BATE -40°C to +125°C 16 TQFN-EP**
Ordering Information continued at end of data sheet.
* The package code is T1655-3.
** EP = Exposed pad.
+ Denotes lead-free package.
5.0
5.0
Typical Operating Circuit
TOP VIEW
Pin Configuration
VIN
12
11
10
9
7.5V TO 76V
C IN
68 μ F
C BYPASS
0.47 μ F
V IN
R IN
10 ?
DRAIN
LX
100 μ H
V OUT
5V/2A
DRAIN 13
DRAIN 14
EP
8
7
FB
SS
ON/OFF
C BST
0.22 μ F
D1
PDS5100H
C OUT
100 μ F
N.C. 15
MA5090
6
SYNC
MAX5090B
BST
FB
N.C. 16
5
VD
SYNC
SGND
PGND
SS
VD
3.3 μ F
C SS
0.047 μ F
1
2
3
4
TQFN
________________________________________________________________ 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
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