參數(shù)資料
型號(hào): LTC1515
廠商: Linear Technology Corporation
英文描述: Quadruple 2-Input Exclusive-OR Gates 14-SOIC 0 to 70
中文描述: 降壓型開(kāi)關(guān)電容DC / DC轉(zhuǎn)換器的復(fù)位
文件頁(yè)數(shù): 4/8頁(yè)
文件大小: 233K
代理商: LTC1515
4
LTC1515 Series
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
LTC1515-X Shutdown Supply
Current vs Input Voltage
LTC1515-X Step-Down Mode
5V Load Transient Response
INPUT VOLTAGE (V)
0
P
μ
A
25
20
15
10
5
0
8
1515 G12
2
4
6
10
85
°
C
SHDN = 0V
–40
°
C
25
°
C
V
OUT
AC COUPLED
100mV/DIV
I
OUT
50mA/DIV
V
IN
= 8V, V
OUT
= 5V, C
OUT
= 10
μ
F, T
A
= 25
°
C
1515 G10
50mA
0mA
V
OUT
AC COUPLED
100mV/DIV
I
OUT
50mA/DIV
LTC1515-X Step-Up Mode
5V Load Transient Response
V
IN
= 3.3V, V
OUT
= 5V, C
OUT
= 10
μ
F, T
A
= 25
°
C
1515 G11
low will force V
OUT
to 3V (LTC1515-3/5) or 3.3V (LTC1515-
3.3/5). As with the SHDN pin, the 5/3 pin may be driven with
3V logic over the entire V
IN
range. The 5/3 pin may not float.
FB (LTC1515) (Pin 3):
Feedback Input. The voltage on this
pin is compared to the internal reference voltage (1.232V)
to keep the output in regulation. An external resistor divider
is required between V
OUT
and FB to adjust the output
voltage. Total divider resistance should not exceed 2M.
GND (Pin 4):
Ground. Should be tied to a ground plane for
best performance.
C1
(Pin 5):
Charge Pump Flying Capacitor, Negative
Terminal.
SHDN (Pin 1):
Shutdown Input. A logic low on the SHDN
pin puts the part into shutdown mode. A logic high (V
SHDN
1.6V) enables the part. At high V
IN
voltages, the SHDN
pin may still be controlled with 3V logic without causing a
large rise in V
IN
quiescent current. The SHDN pin may not
float; connect to V
IN
if unused.
POR (Pin 2):
Open-Drain Power-On Reset Output. This pin
will pull low upon initial power-up, during shutdown or
until V
OUT
has been within 6.5% of its regulated value for
more than 200ms typ.
5/3 (LTC1515-X) (Pin 3):
Output Voltage Select. A logic
high on the 5/3 pin will force V
OUT
to regulate to 5V. A logic
PI
FU
CTIO
N
S
U
U
INPUT VOLTAGE (V)
0
E
100
80
60
40
20
8
1515 G09
2
4
6
10
V
OUT
= 3V
I
OUT
= 10mA
T
A
= 25
°
C
LTC1515-X
3V Efficiency vs Input Voltage
LTC1515-X
5V Efficiency vs Input Voltage
INPUT VOLTAGE (V)
2
E
100
80
60
40
20
10
1515 G08
4
6
8
12
V
OUT
= 5V
I
= 10mA
TA = 25
°
C
INPUT VOLTAGE (V)
0
E
100
80
60
40
20
8
1515 G07
2
4
6
10
V
OUT
= 3.3V
I
= 10mA
TA = 25
°
C
LTC1515-X
3.3V Efficiency vs Input Voltage
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