參數(shù)資料
型號(hào)： MAX748A
廠商： Maxim Integrated Products, Inc.
元件分類： 通用總線功能
英文描述： Synchronous 4-Bit Up/Down Binary Counters 20-LCCC -55 to 125
中文描述： 3.3V、降壓型、電流模式PWM DC-DC轉(zhuǎn)換器
文件頁(yè)數(shù)： 5/12頁(yè)
文件大小： 135K
代理商： MAX748A
M
3.3V, S tep-Down,
Current-Mode PWM DC-DC Converters
_______________________________________________________________________________________
5
_________________________________Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 3, T
A
= +25°C, V
OUT
= 3.3V, unless otherwise noted.)
SWITCHING WAVEFORMS,
CONTINUOUS CONDUCTION
2
μ
s/div
A: SWITCH VOLTAGE (LX PIN), 5V/div, 0V TO+6V
B: INDUCTOR CURRENT, 200mA/div
C: OUTPUT VOLTAGE RIPPLE, 50mV/div
V+ = 6V, IOUT= 250mA
6V
0V
400mA
0mA
A
B
B
C
SWITCHING WAVEFORMS,
DISCONTINUOUS CONDUCTION
2
μ
s/div
A: SWITCH VOLTAGE (LX PIN), 5V/div, 0V TO+6V
B: INDUCTOR CURRENT, 100mA/div
C: OUTPUT VOLTAGE RIPPLE, 50mV/div
V+ = 6V, IOUT= 75mA
6V
0V
200mA
0mA
A
C
LINE-TRANSIENT RESPONSE
5ms/div
A: VOUT, 50mV/div
IOUT= 350mA
10V
7V
0V
B
A
LOAD-TRANSIENT RESPONSE
5ms/div
A: VOUT, 50mV/div
B: IOUT, 200mA/div, 0mA TO500mA
V+ = 6V
500mA
0mA
B
A
Note 2:
Operation beyond the specifications listed in the Electrical Characteristics may exceed the power dissipation ratings of
the device.
Note 3:
Wide temperature range circuit of Figure 5 using Sprague surface-mount capacitors.
Note 4:
Standby current includes all external component leakage currents. Capacitor leakage currents dominate at TA= +85°C.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX748AC/D 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.7mA Quiescent Current-Mode PWM DC-DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX748AC/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX748ACPA 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX748ACPA+ 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX748ACWE 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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