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参数资料
| 型号： | MAX8553EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR BUCK PWM 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器，DDR，DDR2 |
| 输入电压： | 4.5 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 可调 |
| 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： | 带卷 (TR) |
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
Pin Description
PIN
MAX8553
MAX8554
FUNCTION
Enable/High-Side Drain. Connect to the high-side N-channel MOSFET drain through a 5.1k ?
1
EN/HSD
—
REFIN
—
HSD
—
resistor for normal operation. Connect to GND for low-power shutdown (Figure 2). If the enable
function is not used, connect EN/HSD directly to the high-side N-channel MOSFET drain.
High-Side Drain. Connect to the high-side N-channel MOSFET drain for normal operation.
Reference Input. An applied voltage at REFIN sets V VTT and V VTTR to 1/2 V REFIN . REFIN voltage
range is from 0 to +3.6V.
2
—
EN
Enable. Drive EN high to enable the output. Drive EN low to shut down the IC. If the enable
function is not used, connect EN to V+.
3
4
5
6
7
8
POK
VTT
—
ILIM
FSEL
REF
GND
VTTR
POK
—
FB
ILIM
FSEL
REF
GND
—
Power-OK Output. POK is an open-drain output and is logic high when both VTT and VTTR are
within 12% of regulation. POK is pulled low in shutdown.
VTT Feedback Input. Connect to VTT output.
Output Feedback. Connect to the center of a resistor-divider between the output and ground to
set the output voltage. FB threshold is 0.6V.
Current-Limit Threshold Adjustment. Connect a resistor from ILIM to GND to set the current-limit
threshold, or connect ILIM to VL for the default setting. See the Setting the Current Limit section.
Frequency Select. Selects the switching frequency. See Tables 1 and 2 for configuration of
FSEL.
Reference. Connect a 0.22μF or greater capacitor from REF to GND.
Ground
VTTR Reference Output. Connect a 1μF or greater capacitor from VTTR to GND. VTTR is
capable of sourcing and sinking up to 25mA.
9
—
OUT
Output Voltage. Connect directly to the output. OUT senses the output voltage to determine the
on-time for the high-side switching MOSFET.
10
11
12
13
14
15
16
V+
VL
DL
PGND
BST
DH
LX
V+
VL
DL
PGND
BST
DH
LX
Input Supply Voltage. Supply input for the VL regulator. Bypass with a 0.22μF or greater
capacitor.
Internal Regulator Output. Connect a 2.2μF or greater capacitor from VL to GND. VL can be
connected to V+ if the operating range is from +4.5V to +5.5V.
Low-Side MOSFET Gate Drive. Connect to the gate of the low-side N-channel MOSFET. DL is
low in shutdown or in undervoltage lockout.
Power Ground
Bootstrapped Supply. Drives high-side N-channel MOSFET. Connect a 0.1μF or greater
capacitor from BST to LX.
High-Side MOSFET Gate Drive. Connect to the high-side N-channel MOSFET gate. DH is low in
shutdown or in undervoltage lockout.
Inductor Switching Node
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8554EEE | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX8554EEE+ | 功能描述:电流型 PWM 控制器 4.5-28V Input Synch Buck Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX8554EEE+T | 功能描述:电流型 PWM 控制器 4.5-28V Input Synch Buck Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX8554EEE-T | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX8554EVKIT | 功能描述:电流型 PWM 控制器 Evaluation Kit for the MAX8553 MAX8554 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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