参数资料
| 型号： | MAX8756ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/30页 |
| 文件大小： | 0K |
| 描述： | IC CNTRL DUAL PS 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，笔记本电脑电源系统 |
| 输入电压： | 4 V ~ 26 V |
| 输出数： | 2 |
| 输出电压： | 1.5V，1.8V，1 V ~ 2.3 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
Interleaved High-Efficiency, Dual Power-Supply
Controllers for Notebook Computers
Pin Description
PIN
MAX8716
MAX8717/
MAX8756/
NAME
FUNCTION
MAX8757
1
2
1
2
V CC
SKIP1
Analog Supply Input. Connect to the system supply voltage (+4.5V to +5.5V) through a
series 20 resistor. Bypass V CC to AGND with a 1 μF or greater ceramic capacitor.
Low-Noise Mode Control for SMPS1. Connect SKIP1 to GND for normal Idle Mode
(pulse-skipping) operation or to V CC for PWM mode (fixed frequency). Connect to REF
for low-noise mode.
2.0V Reference Voltage Output. Bypass REF to AGND with a 0.1 μF or greater ceramic
3
3
REF
capacitor. The reference can source up to 50 μA. Loading REF degrades output voltage
accuracy according to the REF load-regulation error (see the Typical Operating
Characteristics ). The reference shuts down when both ON1 and ON2 are low.
4
4
SKIP2
Low-Noise Mode Control for SMPS2. Connect SKIP2 to GND for normal Idle Mode
(pulse-skipping) operation or to V CC for PWM mode (fixed frequency). Connect to REF
for low-noise mode.
Frequency Select Input. This four-level logic input sets the controller ’s switching
frequency.
—
5
FSEL
FSEL
V CC
MAX8717/MAX8757 (kHz)
500
MAX8756 (kHz)
400
REF
GND
300
200
300
250
5
6
6
7
ON1
ON2
SMPS1 Enable Input. Drive ON1 high to enable SMPS1. Drive ON1 low to shut down
SMPS1.
SMPS2 Enable Input. Drive ON2 high to enable SMPS2. Drive ON2 low to shut down
SMPS2.
SMPS2 Peak Current-Limit Threshold Adjustment. Connect ILIM2 to V CC to enable the
—
8
ILIM2
default 50mV current-limit threshold. In adjustable mode, the current-limit threshold across
CSH2 and CSL2 is precisely 1/10 the voltage seen at ILIM2 over a 500mV to 2.0V range.
The logic threshold for switchover to the 50mV default value is approximately V CC - 1V.
7
9
PGOOD2
SMPS2 Open-Drain Power-Good Output. PGOOD2 is low when SMPS2 is more than 10%
below its regulation threshold, during soft-start, and in shutdown.
Feedback Input for SMPS2. Connect FB2 to V CC for fixed 5V output for the
8
10
FB2
MAX8716/MAX8717/MAX8757, or a fixed 1.8V for the MAX8756. In adjustable mode,
FB2 regulates to 1V.
9
10
11
12
CSL2
CSH2
Negative Current-Sense Input for SMPS2. Connect to the negative terminal of the
current-sense element. Figure 8 describes two different current-sensing options.
Positive Current-Sense Input for SMPS2. Connect to the positive terminal of the current-
sense element. Figure 8 describes two different current-sensing options.
Boost Flying Capacitor Connection for SMPS2. Connect to an external capacitor and
11
13
BST2
diode as shown in Figure 1. An optional resistor in series with BST2 allows the DH2
turn-on current to be adjusted.
12
13
14
15
DH2
LX2
High-Side Gate-Driver Output for SMPS2. DH2 swings from LX2 to BST2.
Inductor Connection for SMPS2. Connect LX2 to the switched side of the inductor. LX2
is the lower supply rail for the DH2 high-side gate driver.
______________________________________________________________________________________
11
相关PDF资料 |
PDF描述 |
|---|---|
| MAX8758ETG+T | IC REG STEP UP 24-TQFN |
| MAX8759ETI+T | IC CNTRL CCFL BACKLIGHT 28TQFN |
| MAX8760ETL+T | IC CNTRLR QUICK PWM 40-TQFN |
| MAX8761ETG+T | IC REG LINEAR LCD 24-TQFN |
| MAX8764ETP+T | IC CNTRL STP DWN HS 20-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8757ETG+ | 制造商:Maxim Integrated Products 功能描述:INTERLEAVED HI-EFF AND DUAL PS CNTRLR 24TQFN EP - Rail/Tube |
| MAX8757ETI+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8758ETG+ | 功能描述:LCD 驱动器 Step-Up Regulator RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX8758ETG+T | 功能描述:LCD 驱动器 Step-Up Regulator RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| MAX8758ETJ | 功能描述:LCD 驱动器 Step-Up Regulator RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。