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参数资料
| 型号： | MAX5098AATJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST ADJ 1A/2A 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 0.85 V，4.5 V ~ 28 V |
| 输入电压： | 4.5 V ~ 19 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz ~ 2.2MHz |
| 电流 - 输出： | 1A，2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
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Dual, 2.2MHz, Automotive Buck or Boost
Converter with 80V Load-Dump Protection
Pin Description
PIN
1, 32
2, 3
4
5
6
7
8
9
10
11
12
13
14
15
NAME
SOURCE2
DRAIN2
PGOOD2
EN2
FB2
COMP2
OSC
SYNC
GATE
ON/OFF
IN_HIGH
V+
V L
SGND
FUNCTION
Converter 2 Internal MOSFET Source Connection. For buck converter operation, connect SOURCE2 to the
switched side of the inductor. For boost operation, connect SOURCE2 to PGND_ (Figure 6).
Converter 2 Internal MOSFET Drain Connection. For buck converter operation, use the MOSFET as a high-
side switch and connect DRAIN2 to the DC-DC converters supply input rail. For boost converter operation,
use the MOSFET as a low-side switch and connect DRAIN2 to the inductor and diode junction (Figure 6).
Converter 2 Open-Drain Power-Good Output. PGOOD2 goes low when converter 2’s output falls below
92.5% of its set regulation voltage. Use PGOOD2 and EN1 to sequence the converters. Converter 2 starts
first.
Converter 2 Active-High Enable Input. Connect to V L for always-on operation.
Converter 2 Feedback Input. Connect FB2 to a resistive divider between converter 2’s output and SGND to
adjust the output voltage. To set the output voltage below 0.8V, connect FB2 to a resistive voltage-divider
from BYPASS to regulator 2’s output (Figure 3). See the Setting the Output Voltage section.
Converter 2 Internal Transconductance Amplifier Output. See the Compensation section.
Oscillator Frequency Set Input. Connect a resistor from OSC to SGND (R OSC ) to set the switching frequency
(see the Setting the Switching Frequency section). Set R OSC for an oscillator frequency equal to the SYNC
input frequency when using external synchronization. R OSC is still required when an external clock is
connected to the SYNC input. See the Synchronization (SYNC)/Clock Output (CKO) section.
External Clock Synchronization Input. Connect SYNC to a 400kHz to 4400kHz clock to synchronize the
switching frequency with the system clock. Each converter frequency is 1/2 of the frequency applied to
SYNC (FSEL_1 = V L ). For FSEL_1 = SGND, the switching frequency of converter 1 becomes 1/4 of the
SYNC frequency. Connect SYNC to SGND when not used.
Gate Drive Output. Connect to the gate of the external n-channel load-dump protection MOSFET. GATE =
IN_HIGH + 9V (typ) with IN_HIGH = 12V. GATE pulls to IN_HIGH by an internal n-channel MOSFET when V+
raises 2V above IN_HIGH. Leave gate unconnected if the load-dump protection is not used (MOSFET not
installed).
n-Channel Switch Enable Input. Drive ON/OFF high for normal operation. Drive ON/OFF low to turn off the
external n-channel load-dump protection MOSFET and reduce the supply current to 7μA (typ). When
ON/OFF is driven low, both DC-DC converters are disabled and the PGOOD_ outputs are driven low.
Connect to V+ if the external load-dump protection is not used (MOSFET not installed).
Startup Input. IN_HIGH is protected by internally clamping to 21V (max). Connect a resistor (4k Ω max) from
IN_HIGH to the drain of the protection switch. Bypass IN_HIGH with a 4.7μF electrolytic or 1μF minimum
ceramic capacitor. Connect to V+ if the external load-dump protection is not used (MOSFET not installed).
Input Supply Voltage. V+ can range from 5.2V to 19V. Connect V+, IN_HIGH, and V L together for 4.5V to
5.5V input operation. Bypass V+ to SGND with a 1μF minimum ceramic capacitor.
Internal Regulator Output. The V L regulator is used to supply the drive current at input VDRV. When driving
VDRV, use an RC lowpass filter to decouple switching noise from VDRV to the V L regulator (see the Typical
Application Circuit ). Bypass V L to SGND with a 4.7μF minimum ceramic capacitor.
Signal Ground. Connect SGND to exposed pad and to the board signal ground plane. Connect the board
signal ground and power ground planes together at a single point.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5098AATJ+ | 功能描述:直流/直流开关转换器 Dual 2.2MHz Buck or Boost Converter 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 |
| MAX5098AATJ+T | 功能描述:直流/直流开关转换器 Dual 2.2MHz Buck or Boost Converter 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 |
| MAX5099 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection |
| MAX5099ATJ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection |
| MAX5099ATJ+ | 功能描述:直流/直流开关转换器 Dual 2.2MHz Synch Buck Converter 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 |
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