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参数资料
| 型号： | MAX16904SATB50/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 5V 0.6A 10TDFN |
| 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） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 3.5 V ~ 28 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.1MHz |
| 电流 - 输出： | 600mA |
| 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： | 8-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
MAX16904
2.1MHz, High-Voltage,
600mA Mini-Buck Converter
Δ V ESR
Δ I P ? P ?
? ? I OUT +
C IN = OUT
Δ I P ? P =
ESR =
?
?
2 ?
I × D(1 ? D)
Δ V Q × f SW
where:
(V IN ? V OUT ) × V OUT
V IN × f SW × L
V OUT _ RIPPLE ? Δ V ESR + Δ V Q
Δ I P-P is the peak-to-peak inductor current as calculated
above and f SW is the converter’s switching frequency.
D = OUT
where:
and:
Δ I P ? P =
(V IN ? V OUT ) × V OUT
V IN × f SW × L
V
V IN
The allowable deviation of the output voltage during
fast transient loads also determines the output capaci-
tance and its ESR. The output capacitor supplies the
step load current until the converter responds with a
greater duty cycle. The response time (t RESPONSE )
depends on the closed-loop bandwidth of the convert-
er. The device’s high switching frequency allows for a
higher closed-loop bandwidth, thus reducing
ESR OUT =
C OUT = STEP RESPONSE
Δ V ESR
Δ I P ? P
where I OUT is the output current, D is the duty cycle,
and f SW is the switching frequency. Use additional
input capacitance at lower input voltages to avoid pos-
sible undershoot below the UVLO threshold during tran-
sient loading.
Output Capacitor
To maintain acceptable phase margin, a minimum
ceramic output capacitor value of 10μF is needed with
a voltage rating of 2 times the V OUT voltage. Additional
output capacitance may be needed based on applica-
tion-specific output voltage ripple requirements.
The allowable output-voltage ripple and the maximum
deviation of the output voltage during step load cur-
rents determine the output capacitance and its ESR.
The output ripple comprises of Δ V Q (caused by the
capacitor discharge) and Δ V ESR (caused by the ESR of
the output capacitor). Use low-ESR ceramic or alu-
minum electrolytic capacitors at the output. For alu-
minum electrolytic capacitors, the entire output ripple is
contributed by Δ V ESR . Use the ESR OUT equation to cal-
culate the ESR requirement and choose the capacitor
accordingly. If using ceramic capacitors, assume the
contribution to the output ripple voltage from the ESR
and the capacitor discharge to be equal. The following
equations show the output capacitance and ESR
requirement for a specified output-voltage ripple.
ESR =
t RESPONSE and the output capacitance requirement.
The resistive drop across the output capacitor’s ESR
and the capacitor discharge causes a voltage droop
during a step load. Use a combination of low-ESR tan-
talum and ceramic capacitors for better transient load
and ripple/noise performance. Keep the maximum out-
put-voltage deviations below the tolerable limits of the
electronics being powered. When using a ceramic
capacitor, assume an 80% and 20% contribution from
the output capacitance discharge and the ESR drop,
respectively. Use the following equations to calculate
the required ESR and capacitance value:
Δ V ESR
I STEP
I × t
Δ V Q
where I STEP is the load step and t RESPONSE is the
response time of the converter. The converter response
time depends on the control-loop bandwidth.
PCB Layout Guidelines
Careful PCB layout is critical to achieve low switching
power losses and clean stable operation. Use a multilayer
board wherever possible for better noise immunity. Refer
to the MAX16904 Evaluation Kit for recommended PCB
layout. Follow these guidelines for a good PCB layout:
1) The input capacitor (4.7 μF, see the applications
Maxim Integrated
C OUT =
Δ I P ? P
8 × Δ V Q × f SW
schematic in the Typical Operating Circuits) should be
placed right next to the SUP pins (pins 2 and 3 on the
TSSOP-EP package). Because the device operates at
2.1MHz switching frequency, this placement is critical
for effective decoupling of high-frequency noise from
the SUP pins.
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16904SATB51/V+T | 功能描述:直流/直流开关转换器 2.1MHz 600mA Mini 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 |
| MAX16904SATB52/V+T | 制造商:Maxim Integrated Products 功能描述:2.1MHZ, HIGH-VOLTAGE, MINI-BUCK CONVERTER - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC REG BUCK SYNC 5.2V .6A 10TDFN 制造商:Maxim Integrated Products 功能描述:Voltage Regulators - Switching Regulators |
| MAX16904SATB60/V+T | 功能描述:直流/直流开关转换器 2.1MHz, 600mA Mini 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 |
| MAX16904SATB80/V+T | 功能描述:直流/直流开关转换器 2.1MHz, 600mA Mini 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 |
| MAX16904SAUE33/V+ | 功能描述:直流/直流开关转换器 2.1MHz Mini-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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