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参数资料
| 型号： | MAX8537EEI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/23页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR BUCK DUAL 28-QSOP |
| 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，DDR |
| 输入电压： | 4.5 V ~ 23 V |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 3.6 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-QSOP |
| 供应商设备封装： | 28-QSOP |
| 包装： | 带卷 (TR) |
Dual-Synchronous Buck Controllers for Point-of-
Load, Tracking, and DDR Memory Power Supplies
Pin Description
PIN
1
2
NAME
(MAX8537/
MAX8539)
BST2
DH2
NAME
(MAX8538)
BST2
DH2
FUNCTION
Bootstrap Input to Power Internal High-Side Driver for Step-Down 2. Connect to an
external capacitor and diode according to Figure 1.
High-Side Gate-Driver Output for Step-Down 2. Swings from LX2 to BST2.
External Inductor Input for Step-Down 2. Connect to the switched side of the inductor.
3
LX2
LX2
LX2 serves as the lower supply-voltage rail for the DH2 high-side gate driver and the
current-limit circuitry.
Output Current-Limit Setting for Step-Down 2. Connect a resistor from ILIM2 to the
4
ILIM2
ILIM2
drain of the step-down 2 high-side MOSFET, or to the junction of the source of the
high-side MOSFET and the current-sense resistor to set the current-limit threshold.
See the Current-Limit Setting section.
5
6
7
8
9
POK1
DL2
POK2
EN2
EN1
POK1
DL2
POK2
EN2
EN1
Open-Drain Output. High impedance when step-down 1 is within 12% of its regulation
voltage. POK1 is pulled low in shutdown.
Low-Side Gate-Driver Output for Step-Down 2. Swings from PGND to VL.
Open-Drain Output. High impedance when step-down 2 is within 12% of its regulation
voltage. POK2 is pulled low in shutdown or if REFIN is undervoltage.
Enable Input for Step-Down 2 (also for VTTR for the MAX8537 and MAX8539)
Enable Input for Step-Down 1
Frequency Adjust. Connect a resistor from this pin to ground to set the frequency. The
10
FREQ
FREQ
range of the FREQ resistor is 163k ? , 20k ? , and 100k ? (corresponding to 1.4MHz,
1.0MHz, and 200kHz).
11
12
13
COMP2
FB2
SS2
COMP2
FB2
SS2
Compensation Pin for Step-Down 2. Connect to compensation networks.
Feedback Input for Step-Down 2 with V REFIN as the Threshold. User must have
impedance <40k ? .
Soft-Start for Step-Down 2. Connect a capacitor to GND to set the soft-start time.
Reference Input for V TT and V TTR . Connect it to a resistor-divider from V DDQ . REFIN
14
15
16
17
18
19
20
21
REFIN
—
GND
SS1
FB1
COMP1
VTTR
—
AVL
V+
—
N.C.
GND
SS1
FB1
COMP1
—
GND
AVL
V+
common-mode voltage range is 0.5V to 2.5V. Current through the divider-resistors
must be ≥ 100μA.
For the MAX8538, connect pin 14 to GND.
Analog Ground for Internal Circuitry
Soft-Start for Step-Down 1. Connect a capacitor to GND to set the soft-start time.
Feedback Input for Step-Down 1 with 0.8V Threshold. User must have impedance
<40k ? .
Compensation Pin for Step-Down 1. Connect to compensation networks.
VTTR Output Capable of Sourcing and Sinking Up to 15mA. Always bypass with a 1μF
ceramic capacitor (or larger) to GND.
Analog Ground for Internal Circuitry
Analog VL Input Pin. Connect to VL through a 4.7 ? resistor. Bypass with a 0.1μF (or
larger) ceramic capacitor to GND.
Input Supply Voltage
_______________________________________________________________________________________
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8537EVKIT | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8538EEI | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8538EEI+ | 功能描述:DC/DC 开关控制器 Dual-Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8538EEI+T | 功能描述:DC/DC 开关控制器 Dual-Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8538EEI-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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