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| 型号： | MAX15037ATE/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/25页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST SYNC ADJ 16WQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 23 V |
| 输入电压： | 4.5 V ~ 23 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 312kHz ~ 2.1MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
2.2MHz, 3A Buck or Boost Converters
with an Integrated High-Side Switch
At high input-to-output differential, and high switching
frequency, the on-time drops to the order of 100ns.
Even though the MAX15036/MAX15037 can control the
on-time as low as 100ns, the internal current-limit circuit
may not detect the overcurrent within this time. In that
case, the output current during the fault may exceed the
current limit specified in the Electrical Characteristics
table. The MAX15036/MAX15037 may still be protected
against the output short-circuit fault through the
overtemperature shutdown. However, the output switch
current may be as high as 5.6A. If the minimum on-time
for a given frequency and duty cycle is less than
200ns, choose the inductor with a saturation current of
greater than 5.6A.
Power-On Reset ( RESET )
reaches +170°C. A thermal sensor monitors the die
temperature and turns the device on again when the
temperature reduces by +25°C. During thermal shut-
down, the internal power MOSFET shuts off, DL pulls to
SGND, V L shuts down, RESET (MAX15036)/PGOOD
(MAX15037) goes low, and soft-start resets.
Applications Information
Setting the Switching Frequency
The controller generates the switching frequency (f SW )
through the internal oscillator or the signal at SYNC
(f SYNC ), when driven by an external oscillator. The
switching frequency is equal to f SW or f SYNC .
A resistor, R OSC , from OSC to SGND sets the internal
oscillator. The relationship between f SW and R OSC is:
(MAX15036 Only)
RESET is an active-low open-drain output that goes low
when V OUT falls below 92.5% of its nominal set point.
RESET goes high impedance when V OUT rises above
R OSC =
125 × 10 8
f SW
92.5% of its nominal set point, the soft-start period is
complete, and the 200ms (typ) timeout period has
elapsed. Connect a pullup resistor from RESET to a
logic voltage or to V L . The internal open-drain MOSFET
at RESET can sink 3mA while providing a TTL-compati-
ble logic-low signal. Connect RESET to SGND or leave
unconnected when not used.
Power-Good (PGOOD)
(MAX15037 Only)
PGOOD is an open-drain, active-high output that goes
low when V OUT is below 92.5% of its nominal set point
and goes high impedance when V OUT goes above
92.5% its nominal set point. Connect a pullup resistor
from PGOOD to a logic voltage or to V L . PGOOD can sink
up to 3mA while still providing a TTL-compatible logic-low
output. Pulling EN low forces PGOOD low. Connect
PGOOD to SGND or leave unconnected when not used.
Thermal-Overload Protection
During a continuous output short-circuit or overload
condition, the die junction temperature in the
MAX15036/MAX15037 can exceed its limit. The
MAX15036/MAX15037 provide an internal thermal shut-
down to turn off the device when the die temperature
where f SW is in Hertz, and R OSC is in ohms. For exam-
ple, a 1.25MHz switching frequency is set with R OSC =
10k Ω . Higher frequencies allow designs with lower
inductor values and less output capacitance.
Consequently, peak currents and I 2 R losses are lower
at higher switching frequencies, but core losses, gate-
charge currents, and switching losses increase.
Rising clock edges on SYNC are interpreted as a syn-
chronization input. If the SYNC signal is lost, the internal
oscillator takes control of the switching rate, returning
the switching frequency to that set by R OSC . This main-
tains output regulation even with intermittent SYNC sig-
nals. When using an external synchronization signal, set
R OSC so that (0.8 x f SYNC ) ≤ f SW ≤ (1.2 x f SYNC ).
Buck Converter
Use the internal n-channel power MOSFET as a high-
side switch to configure the MAX15036/MAX15037 as a
buck converter. In this configuration, SOURCE is con-
nected to the inductor, DRAIN is connected to the
input, and BST/VDD connects to the cathode of the
bootstrap diode and capacitor. Figures 5 and 6 show
the typical application circuits for MAX15036/
MAX15037, respectively, in a buck configuration.
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相关代理商/技术参数 |
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| MAX15038ETG+ | 功能描述:直流/直流开关调节器 4A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15038ETG+T | 功能描述:直流/直流开关调节器 4A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15038EVKIT+ | 功能描述:电源管理IC开发工具 4A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX15039ETG+ | 功能描述:直流/直流开关调节器 6A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15039ETG+T | 功能描述:直流/直流开关调节器 6A 2MHz Step-Down w/Integrated Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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