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參數(shù)資料
| 型號： | MAX8554 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 4.5V to 28V Input. Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications |
| 中文描述： | 4.5V至28V輸入、同步PWM buck控制器，適合DDR端接和負(fù)載點(diǎn)應(yīng)用 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 483K |
| 代理商： | MAX8554 |
M
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
______________________________________________________________________________________
11
Pin Description
PIN
MAX8553
MAX8554
FUNCTION
EN/HSD
—
Enable/High-Side Drain. Connect to the high-side N-channel MOSFET drain through a 5.1k
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.
1
—
HSD
High-Side Drain. Connect to the high-side N-channel MOSFET drain for normal operation.
REFIN
—
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
POK
POK
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
—
VTT Feedback Input. Connect to VTT output.
4
—
FB
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.
5
ILIM
ILIM
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.
6
FSEL
FSEL
Frequency Select. Selects the switching frequency. See Tables 1 and 2 for configuration of
FSEL.
7
8
REF
GND
REF
GND
Reference. Connect a 0.22μF or greater capacitor from REF to GND.
Ground
VTTR
—
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
V+
V+
Input Supply Voltage. Supply input for the VL regulator. Bypass with a 0.22μF or greater
capacitor.
11
VL
VL
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.
12
DL
DL
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.
13
PGND
PGND
Power Ground
14
BST
BST
Bootstrapped Supply. Drives high-side N-channel MOSFET. Connect a 0.1μF or greater
capacitor from BST to LX.
15
DH
DH
High-Side MOSFET Gate Drive. Connect to the high-side N-channel MOSFET gate. DH is low in
shutdown or in undervoltage lockout.
16
LX
LX
Inductor Switching Node
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MAX8554EEE | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX8554EEE+ | 功能描述:電流型 PWM 控制器 4.5-28V Input Synch Buck Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX8554EEE+T | 功能描述:電流型 PWM 控制器 4.5-28V Input Synch Buck Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX8554EEE-T | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX8554EVKIT | 功能描述:電流型 PWM 控制器 Evaluation Kit for the MAX8553 MAX8554 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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