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參數資料
| 型號： | MAX606 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quadruple 2-Input Positive-NAND Gates With Open-Collector Output 14-CDIP -55 to 125 |
| 中文描述： | 小尺寸、5V/12V或可調、升壓型DC-DC轉換器，用于PCMCIA閃存卡 |
| 文件頁數： | 9/12頁 |
| 文件大?。?/td> | 213K |
| 代理商： | MAX606 |
M
Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
_______________________________________________________________________________________
9
The on/off times are determined by the input and output
voltages:
t
ON
= K / V
IN
t
OFF
= 0.5
·
K / (V
OUT
+ V
DIODE
- V
IN
)
K is typically 3μs-V for the MAX606 and 6μs-V for the
MAX607. This factor is chosen to set the optimum
switching frequency and the one-cycle current limit,
which determines the no-load output ripple at low out-
put-to-input voltage differentials. The factor of 0.5 in the
off-time equation is the typical switch off-time ratio. This
ratio guarantees high efficiency under a heavy load by
allowing the inductor to operate in continuous-conduc-
tion mode. For example, a switch off-time ratio of 1
would cause the device to operate on the edge of dis-
continuous-conduction mode.
To determine the actual switch off-time ratio for a par-
ticular device, measure t
ON
, t
OFF
, V
IN
, and V
OUT
, and
then solve for the ratio by substituting these values into
the off-time equation.
Unlike PWM converters, the MAX606/MAX607 generate
variable-frequency switching noise. However, the
amplitude of this noise does not exceed the product of
the switch current limit and the output capacitor equiva-
lent series resistance (ESR). Traditional clocked-PFM or
pulse-skipping converters cannot make this claim.
Output V oltage S elec tion
The MAX606/MAX607 output voltage is pin-program-
mable to 5V and 12V, and also adjustable to voltages
between V
IN
and 12.5V. Connect FB to IN for a 5V out-
put, to GND for a 12V output, or to a resistive divider
between the output and GND for an adjustable output.
Always connect OUT to the output.
UNDER-
VOLTAGE
LOCKOUT
DUAL
MODE
REF
CURRENT-LIMIT
COMPARATOR
ERROR
COMPARATOR
TIMING CIRCUIT
t
ON
t
OFF
CONTROL
LOGIC
EN
ON
INH
OFF
SHDN
FB
INT/EXT
FB
5V/12V
OUT
SS
PGND
INTERNAL
POWER
1
SWITCH
LX
IN
V
REF
DRIVER
R
LIM
MAX606
MAX607
Figure 3. Functional Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| MAX607 | Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards |
| MAX606EUA | Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards |
| MAX607EUA | Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA Cards |
| MAX608EPA | 5V or Adjustable, Low-Voltage, Step-Up DC-DC Controller |
| MAX608ESA | 5V or Adjustable, Low-Voltage, Step-Up DC-DC Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX6061 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Precision, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References |
| MAX6061AEUR | 制造商:Maxim Integrated Products 功能描述:PRECISION, MICROPOWER, LOW-DROPOUT, HIGH-OUTP - Cut Tape Product |
| MAX6061AEUR+ | 制造商:Maxim Integrated Products 功能描述:V-REF PRECISION 1.248V 5MA 3PIN SOT-23 - Rail/Tube |
| MAX6061AEUR+T | 功能描述:基準電壓& 基準電流 uPower Low-Dropout Voltage Ref RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| MAX6061AEUR-T | 功能描述:基準電壓& 基準電流 RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
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