參數(shù)資料
型號(hào): MAX867
廠商: Maxim Integrated Products, Inc.
英文描述: Hex Inverters 14-CFP -55 to 125
中文描述: 3.3V/5V或可調(diào)輸出、單節(jié)電池DC-DC轉(zhuǎn)換器
文件頁(yè)數(shù): 6/12頁(yè)
文件大?。?/td> 139K
代理商: MAX867
M
3.3V /5V or Adjustable-Output,
S ingle-Cell DC-DC Converters
6
_______________________________________________________________________________________
______________________________________________________________Pin Desc ription
N-Channel Power-MOSFET Drain
8
8
Low-Battery Output. An open-drain N-channel MOSFET sinks current when the voltage at
LBI drops below 1.25V.
4
4
Low-Battery Input. When the voltage on LBI drops below 1.25V, LBO sinks current.
If not used, connect to V
IN
.
Connect OUT to the regulator output. OUT provides bootstrap power to the IC.
Power Ground. Must be low impedance; solder directly to ground plane.
5
5
6
7
6
7
1.25V Reference Voltage Output. Bypass with 0.22μF to GND (0.1μF if there is no external
reference load). Maximum load capability is 250μA source, 20μA sink.
3
3
Feedback Input for adjustable-output operation. Connect to an external resistor voltage
divider between OUT and GND.
2
Selects the output voltage; connect to GND for 5V output, and to OUT for 3.3V output.
2
Shutdown Input. When low, the entire circuit is off and V
OUT
= V
IN
- V
D,
where V
D
is the
forward voltage drop of the external Schottky rectifier.
1
1
FUNCTION
PIN
LX
LBO
LBI
OUT
GND
REF
FB
3/––
–———N
NAME
MAX866
MAX867
____________________________Typic al Operating Charac teristic s (c ontinued)
(Circuits of Figure 2, T
A
= +25°C, unless otherwise noted.)
24
-60
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
30
28
26
22
M
EMPERATURE (°C)
Q
μ
A
0
60
-20
-40
20
80
40
100
20
I
OUT
V
OUT
= 3.47V
1.250
-60
REFERENCE VOLTAGE
vs. TEMPERATURE
1.255
M
EMPERATURE (°C)
R
0
60
-20
-40
20
80
40
100
1.245
I
REF
= 0A
-60
OUTPUT CURRENT CAPABILITY
vs. TEMPERATURE
30
25
20
15
M
EMPERATURE (°C)
O
0
60
-20
-40
20
80
40
100
10
V
IN
= 0.9V
3.3V MODE
V
IN
= 1.2V
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