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参数资料
| 型号： | ILC6382 |
| 厂商： | Impala Linear Corporation |
| 英文描述： | 1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
| 中文描述： | 1节至3与真正的负载断开，3.3V或可调输出5V的电池升压 |
| 文件页数： | 8/19页 |
| 文件大小： | 1455K |
| 代理商： | ILC6382 |
1-Cell to 3-Cell Boost with True Load Disconnect, 3.3V, 5V, or Adjustable Output
Impala Linear Corporation
8
(408) 574-3939
www.impalalinear.com
Oct 1999
ILC6382 1.5
The following equation is used when V
IN
is lower than
1.25V:
R1 = R2 x [(V
REF
- V
IN
) / (V
OUT
- V
REF
)],
where V
REF
= 1.25V (nom.)
This equation can also be derived using voltage divider for-
mula across R2. A typical value for R2 is 100k
.
Note that
the low battery detector does not operate when the
ILC6382 is in PFM mode or in shutdown.
Shut Down
The LBI pin is shared with the shutdown pin. A low voltage
(<0.4V) will put the ILC6382 into a power down state. The
simplest way to implement this is with an FET across R6 as
shown in figure 8. Note that when the device is not in PWM
mode or is in shutdown the low battery detector does not
operate.
When the ILC6382 is shut down, the synchronous rectifier
disconnects the output from the input. This ensures that
there is only leakage (I
IN
< 1μA typical) from the input to the
output so that the battery is not drained when the ILC6382
is shut down.
Power Good Output (POK)
The POK output of the ILC6382 indicates when V
OUT
is
within the regulation tolerance of the set output voltage.
POK output is an open drain device output capable of sink-
ing 2mA. It will remain pulled low until the output voltage
has risen to typically 95% of the specified V
OUT.
Note that a
pull-up resistor must be connected from the POK output
(pin 5 of ILC6382CIR-XX) to either ILC6382's output or to
some other system voltage source.
Adjustable Output Voltage Selection
The ILC6382-ADJ allows the output voltage to be set using
a potential divider. The formula for setting the adjustable
output voltage is;
V
OUT
= V
FB
x (1+R1/R2)
Where V
FB
is the threshold set which is 1.25V nominal.
Negative Voltage Output
It is possible to generate a negative output voltage as a sec-
ondary supply using the ILC6382. This negative voltage
may be useful in some applications where a negative bias
voltage at low current is required.
V
OUT
8
R2
3
LBI/SD
V
IN
R1
ILC6382
+
-
1.25V
Internal
Reference
GND
7
ON/OFF
R5
R6
LBI/SD
3
ILC6382
2 V
IN
7 GND
10
μ
F
ON
OFF
V
IN
1 to 3-cell
R5
R6
15
μ
H
Ext Sync
(Connect to GND if unused)
L
10μF
C
OUT
R1
R2
ILC6382-ADJ
MSOP-8
L
X
V
IN
LBI/SD
SYNC
GND
LBO
V
FB
V
OUT
V
OUT
V
OUT
= 1.25 (1+R1/R2)
1
2
3
4
8
7
6
5
C
IN
+
1
2
L
L
X
V
IN
V
IN
ILC6382
0.01μF
0.01μF
-V
1A Schottky Diodes
Figure 7: V
LBI
< 1.25V
Figure 8: Shut Down Control
Figure 9: Adjustable Voltage Configuration
Figure 10: Negative Output Votlage
相关PDF资料 |
PDF描述 |
|---|---|
| ILC6383 | 1-Cell to 3-Cell Boost DC-DC Converter with True Load Disconnect, 3.3V, 5V or Adjustable Output |
| ILC6383CIR33X | 1-Cell to 3-Cell Boost DC-DC Converter with True Load Disconnect, 3.3V, 5V or Adjustable Output |
| ILC6383CIR50X | 1-Cell to 3-Cell Boost DC-DC Converter with True Load Disconnect, 3.3V, 5V or Adjustable Output |
| ILC6383CIRADJX | 1-Cell to 3-Cell Boost DC-DC Converter with True Load Disconnect, 3.3V, 5V or Adjustable Output |
| ILC6660IK | CMOS MONOLITHIC VOLTAGE CONVERTER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ILC6382CIR-33 | 制造商:IMPALA 制造商全称:IMPALA 功能描述:1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
| ILC6382CIR-50 | 制造商:IMPALA 制造商全称:IMPALA 功能描述:1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
| ILC6382CIR-ADJ | 制造商:IMPALA 制造商全称:IMPALA 功能描述:1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
| ILC6383 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:1-Cell to 3-Cell Boost DC-DC Converter with True Load Disconnect, 3.3V, 5V or Adjustable Output |
| ILC6383CIR-33 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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