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| 型号： | MAX8621YETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC PMIC W/DC-DC SUP 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 手持/移动设备 |
| 电源电压： | 2.6 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
ATION
EVALU
AVAIL
19-3539; Rev 1; 8/05
KIT
ABLE
Dual Step-Down DC-DC Power-Management ICs
for Portable Devices
General Description
The MAX8621Y/MAX8621Z power-management inte-
grated circuits (PMICs) are designed for a variety of
portable devices including cellular handsets. These
PMICs include two high-efficiency step-down DC-DC
converters, four low-dropout linear regulators (LDOs)
with pin-programmable capability, one open-drain dri-
ver, a 60ms (typ) reset timer, and power-on/off control
logic. These devices offer high efficiency with a no-load
supply current of 160μA, and their small thin QFN 4mm
x 4mm package makes them ideal for portable devices.
The step-down DC-DC converters utilize a proprietary
4MHz hysteretic-PWM control scheme that allows for
ultra-small external components. Internal synchronous
rectification improves efficiency and eliminates the
Features
? Two 500mA Step-Down Converters
Up to 4MHz Switching Frequency
Adjustable Output from 0.6V to 3.3V
? Four Low-Noise LDOs with Pin-Programmable
Output Voltages
? One Open-Drain Driver
? 60ms (typ) Reset Timer
? Power-On/Off Control Logic and Sequencing
? 4mm x 4mm x 0.8mm 24-Pin Thin QFN
Ordering Information
external Schottky diode that is required in conventional
step-down converters. The output voltage is adjustable
from 0.6V to 3.3V. The output current is guaranteed up
to 500mA.
The four LDOs offer low 45μV RMS output noise and low
dropout of only 100mV at 100mA. OUT1 and OUT2
deliver 300mA (min) of continuous output current.
OUT3 and OUT4 deliver 150mA (min) of continuous
output current. The output voltages are pin selectable
by SEL1 and SEL2 for flexibility. The MAX8621Y/
MAX8621Z offer different sets of LDO output voltages.
PART
MAX8621YETG
MAX8621YETG+
MAX8621ZETG
MAX8621ZETG+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 Thin QFN
4mm x 4mm (T2444-4)
24 Thin QFN
4mm x 4mm (T2444-4)
24 Thin QFN
4mm x 4mm (T2444-4)
24 Thin QFN
4mm x 4mm (T2444-4)
A microprocessor reset output ( RESET ) monitors OUT1
and warns the system of impending power loss, allow-
ing safe shutdown. RESET asserts during power-up,
+ Denotes lead-free package.
Typical Operating Circuit
power-down, shutdown, and fault conditions where
V OUT1 is below its regulation voltage.
A 200mA driver output is provided to control LED back-
lighting or provide an open-drain connection for resis-
INPUT
2.6V TO 5.5V
IN1
IN2
MAX8621Y
MAX8621Z
LX1
FB1
BUCK1
1.375V, 500mA
tors such as in feedback networks.
Cellular Handsets
Applications
IN3
PWRON
PGND1
LX2
BUCK2
1.8V, 500mA
Smart Phones, PDAs
Digital Cameras
SEL1
FB2
MP3 Players
SEL2
PGND2
Wireless LAN
Pin Configuration appears at end of data sheet.
EN2
EN3
EN4
ENDR
REFBP
OUT1
RESET
OUT2
OUT3
OUT4
OUT1
2.6V, 300mA
RESET
OUT2
2.6V, 300mA
OUT3
1.8V, 150mA
OUT4
3V, 150mA
INPUT
GND
DR
________________________________________________________________ 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8621ZETG | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZETG+ | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZETG+T | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZETG-T | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZEVKIT | 制造商:Maxim Integrated Products 功能描述:DUAL STEP-DOWN POWER MANAGEMENT IC - Rail/Tube |
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