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| 型号： | MAX1798EGP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/19页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY CDMA 20-QFN |
| 标准包装： | 2,500 |
| 应用： | 手机，CDMA 手持话机 |
| 电流 - 电源： | 367µA |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-QFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN/MLP 裸露焊盘（5x5） |
| 包装： | 带卷 (TR) |
19-1655; Rev 2; 5/10
N KIT M
LUATIO
AVAILA
EVA BLE
ANUAL
CDMA Cellular/PCS System
Power Supplies
General Description
The MAX1798/MAX1798A/MAX1799/MAX1799A system
power supplies are designed specifically for CDMA cel-
lular/PCS handsets. Each device contains five low-
dropout linear regulators (LDOs), a 140ms (min) reset
timer, a serial interface, push-on/push-off control logic,
and two general-purpose open-drain outputs. Only the
serial interface is different between the MAX1798/
MAX1798A/MAX1799/MAX1799A: the MAX1798/
MAX1798A feature an SPI?-compatible serial interface,
and the MAX1799/MAX1799A feature an I 2 C-compati-
ble interface. The “A” parts have a -13% reset thresh-
old, the non-A parts have a 9.5% threshold. The “A”
parts have a 175 delay on a reset-triggered shutdown,
the non-A shutdown instantly.
Each linear regulator features extremely low dropout
voltage, specified at two-thirds of the maximum output
current. LDO1 is rated for 300mA, while LDOs 2–5 are
each rated for 150mA. All LDOs are optimized for low
noise and isolation. Each LDO can be individually
enabled and disabled through the serial port, as well as
individually programmed to any of 32 voltages from
1.8V to 3.3V.
The MAX1798/MAX1798A/MAX1799/MAX1799As’ wide
2.5V to 5.5V input voltage range makes them compati-
ble with a wide range of input supplies, including a sin-
gle lithium-ion (Li+) cell battery. Both devices are
available in thermally-enhanced 20-pin TSSOP and
TQFN exposed pad (EP) packages. Evaluation kits in
TSSOP (MAX1798EVKIT and MAX1799EVKIT) are avail-
able to facilitate designs.
Typical Operating Circuit
Features
o One 300mA Low-Noise LDO
o Four 150mA Low-Noise LDOs
o 45 μ V RMS Noise from 10Hz to 100kHz
o >60dB Crosstalk Isolation Below 10kHz
o >60dB PSRR Below 10kHz
o 125mV (max) Dropout (OUT1 at 200mA)
o 100mV (max) Dropout (OUT2–5 at 100mA)
o Programmable Output Voltages
1.8V to 3.3V in 32 Steps
o 140ms (min) Reset Timer
o SPI- or I 2 C-Compatible Serial Interface
o Push-On/Push-Off Control Logic
o Two 150mA General Purpose Open-Drain Outputs
o Overcurrent and Thermal Protection (all LDOs)
o 1 μ A Shutdown Current
o 20-Pin Thermally-Enhanced TSSOP or TQFN
Packages
Applications
CDMA Cellular/PCS Handsets
PDAs, Palmtops, and Handy-Terminals
ONO
IRQ
Single-Cell Li+ Systems
2.5V
TO 5.5V
IN4/5
IN2/3
IN1
OFF
OUT1
WDOUT
V CC
2- or 3-Cell NiMH, NiCd, or Alkaline Systems
Ordering Information
RSO
RESET
PACKAGE
SPI OR I 2 C
MAX1798
ON MAX1798A*
MAX1799
MAX1799A*
CS (AS)
SCLK (SCK)
DIN (SDA)
BP
OUT2
OUT3
OUT4
OUT5
DR1
TX
RX
BBA
AUDIO OR
PLL + VCO
V IN1
VIBRATOR
TEMP PIN-
PART
RANGE
MAX1798 ETP+ -40 ° C to +85 ° C 20 TQFN
MAX1798EUP+ -40 ° C to +85 ° C 20 TSSOP-EP*
MAX1798A ETP+ -40 ° C to +85 ° C 20 TQFN
MAX1798AEUP+ -40 ° C to +85 ° C 20 TSSOP-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
INTER-
FACE
SPI
SPI
SPI
SPI
0.01 μ F
DR2
*EP = Exposed pad.
GND
PGND
EP
Ordering Information continued and Pin Configurations
appear at end of data sheet.
BACKLIGHT
( ) ARE FOR MAX1799/MAX1799A.
*-13% RESET THRESHOLD AND SHUTDOWN RESET TIMER ADDED.
SPI is a trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
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.
1
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相关代理商/技术参数 |
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| MAX1798EUP | 功能描述:PMIC 解决方案 CDMA Cellular/PCS System Power Supply RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX1798EUP+ | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1798EUP-T | 功能描述:PMIC 解决方案 CDMA Cellular/PCS System Power Supply RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX1799AEGP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1799AEUP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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