参数资料
型号: MAX1765EEE+
厂商: Maxim Integrated
文件页数: 11/19页
文件大小: 867K
描述: IC REG DL BST/LINEAR SYNC 16QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 100
拓扑: 升压(升压)同步(1),线性(LDO)(1)
功能: 任何功能
输出数: 2
频率 - 开关: 1MHz
电压/电流 - 输出 1: 2.5 V ~ 5.5 V,800mA
电压/电流 - 输出 2: 2.85V/可调,500mA
带 LED 驱动器:
带监控器:
带序列发生器:
电源电压: 0.7 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-QSOP
包装: 管件
Light-Load Operation in Normal Mode
At light loads, the MAX1765 operates by turning on the
DC-DC converters N-channel field-effect transistor
(FET) when V
FB
< V
REF
, synchronized with the rising
edge of the oscillator. The N-channel FET will remain
on, ramping up the inductor current past the minimum
inductor current, until the internal error amplifier and
current mode circuitry determine that the needs of the
system have been met or the device hits the ISET cur-
rent limit. The N-channel is then turned off and the P-
channel is turned on until current decays to the
P-channel turn-off current level. The N-channel will
remain off until V
FB
is again less than V
REF
, and a rising
edge of the oscillator occurs.
800mA, Low-Noise, Step-Up DC-DC Converter
with 500mA Linear Regulator
______________________________________________________________________________________ 11
2.15V
ON
OUTL
POUT
LX
PGND
REF
SHUTDOWN
LOGIC
THERMAL
SENSOR
MAX1765
ERROR
AMP
STARTUP
OSCILLATOR
EN
Q
P
P
N
MOSFET DRIVER
WITH CURRENT
LIMITING
EN
1MHz
OSCILLATOR
EN
D
OSC
MODE
SKIP/PWM
Q
Q
IFB
PWM
CONTROLLER
RDY
1.250V
REFERENCE
IC PWR
IREF
ICS
FBL
OUT
V
OUT
ONL
INL
ONB
GND
ONA
V
OUT
 - 300mV
ISET
ONL
REF
CLK/SEL
FB
TRACK
TRACK
ISET
Figure 1. Functional Diagram
Table 1. Selecting the Operating Mode
CLK/SEL
MODE
FEATURES
0
Normal
Operation
High-efficiency pulse
skipping at light loads,
PWM at medium and
heavy loads
1
Forced PWM
Low noise, fixed
frequency at all loads
E xter nal C l
ock
500kH z to
1.2M H z
Synchronized
PWM
Low noise, fixed
frequency at all loads
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相关代理商/技术参数
参数描述
MAX1765EEE+ 功能描述:直流/直流开关转换器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX1765EEE+T 功能描述:直流/直流开关转换器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX1765EEE-T 功能描述:直流/直流开关转换器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX1765EUE 功能描述:直流/直流开关转换器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
MAX1765EUE+ 功能描述:直流/直流开关转换器 800mA Step-Up w/500mA Linear Reg RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT