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參數(shù)資料
| 型號(hào)： | MAX748AEPA |
| 廠(chǎng)商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | Synchronous 4-Bit Up/Down Binary Counters 20-LCCC -55 to 125 |
| 中文描述： | 2 A SWITCHING REGULATOR, 212.5 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大?。?/td> | 135K |
| 代理商： | MAX748AEPA |
M
3.3V, S tep-Down,
Current-Mode PWM DC-DC Converters
_______________________________________________________________________________________
7
SHDN
BIAS
GEN
OUT
CC
C5
330pF
1.23V
BANDGAP
ERROR AMP
C6
1000pF
REF
SS
1M
±35%
C1
0.047
μ
F
Σ
RAMP
GEN
SLOPE COMPENSATION
OVERCURRENT COMPARATOR
CURRENT
SENSE AMP
RSENSE
F/F
S
R
Q
PWM
COMPARATOR
SS CLAMP
200kHz
OSC
GND
VUVLO
UNDERVOLTAGE
LOCKOUT
D1
1N5817
C4
150
μ
F
VOUT
3.3V
L1
22
μ
H
LX
C2
1.0
μ
F
VIN
V+
C3
150
μ
F
MAX748A
MAX763A
MAX748A 3.3V to 16.0V
MAX763A 3.3V to 11.0V
Figure 1. Detailed Block Diagram with External Components
Circuit Cond.
V+ (V) I
OUT
(mA) C1 = 0.01 C1 = 0.047 C1 = 0.1 C1 = 0.47
8
0
1
12*
0
1
8
200
10
12*
200
7
8
300
13
12*
300
8
Soft-Start Time (ms) vs. C1 (μF)
4
2
33
17
44
25
7
3
12
6
200
80
325
140
50
20
65
35
*MAX748A only
Table 1. Typical Soft-Start Times
(Circuit of Figure 3, C4 = 150μF)
FROM SHDN
C1
SS
SS CLAMP
1M
±35%
1.23V
MAX748A
MAX763A
Figure 2. Soft-Start Circuitry Block Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX748AEPA+ | 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 |
| MAX748AEWE | 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 |
| MAX748AEWE+ | 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 |
| MAX748AEWE+T | 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 |
| MAX748AEWE-T | 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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