參數(shù)資料
型號： LTC3026
廠商： Linear Technology Corporation
英文描述： 1.5A Low Input Voltage VLDO Linear Regulator
中文描述： 1.5A的低輸入電壓VLDO線性穩(wěn)壓器
文件頁數(shù)： 3/16頁
文件大?。?/td> 201K
代理商： LTC3026
LTC3026
3
3026f
SYMBOL
V
ADJ
PARAMETER
Regulation Voltage
(Note 5)
Programming Range
Dropout Voltage (Note 6)
ADJ Input Current
Continuous Output Current
Output Current Current Limit
Output Voltage Noise
CONDITIONS
1mA
≤
I
OUT
≤
1.5A, 1.14V
≤
V
IN
≤
3.5V, V
BST
= 5V, V
OUT
= 0.8V
1mA
≤
I
OUT
≤
1.5A, 1.14V
≤
V
IN
≤
3.5V, V
BST
= 5V, V
OUT
= 0.8V
●
MIN
0.397
0.395
0.4
TYP
0.4
0.4
MAX
0.403
0.405
2.6
250
100
UNITS
V
V
V
OUT
●
V
IN
= 1.5V, V
ADJ
= 0.38, I
OUT
= 1.5A
V
ADJ
= 0.4V
V
SHDN
= V
IN
●
100
mV
nA
I
ADJ
I
OUT
I
LIM
e
n
●
–100
1.5
●
A
A
3
f = 10Hz to 100kHz, I
L
= 800mA
Boost Disabled
Boost Enabled
1.14V
≤
V
IN
≤
3.5V
3.5V
≤
V
IN
≤
5.5V
1.14V
≤
V
IN
≤
5.5V
SHDN = V
IN
SHDN = 0V
I
PG
= 2mA
110
210
μ
V
RMS
μ
V
RMS
V
IHSHDN
SHDN Input High Voltage
●
●
1.0
1.2
V
V
V
μ
A
μ
A
V
μ
A
%
%
V
ILSHDN
I
IHSHDN
I
ILSHDN
V
OLPG
I
OHPG
PG
SHDN Input Low Voltage
SHDN Input High Current
SHDN Input Low Current
PG Output Low Voltage
PG Output High Leakage Current V
PG
= 5.5V
Output Threshold (Note 4)
●
0.4
1
1
0.4
1
–6
–4
–1
–1
●
0.1
0.01
–9
–7
PG High to Low
PG Low to High
–12
–10
ELECTRICAL CHARACTERISTICS
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25
°
C.
V
IN
= 1.5V, V
OUT
= 1.2V, V
BST
= 5V, C
IN
= C
BST
= 1
μ
F, C
OUT
= 10
μ
F (all capacitors ceramic) unless otherwise noted.
(BOOST DISABLED, V
SW
= 0V)
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired. This IC has overtemperature protection that
is intended to protect the device during momentary overload conditions.
Junction temperatures will exceed 125
°
C when overtemperature is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 2:
Minimum Operating Voltage required for regulation is:
V
IN
≥
V
OUT(MIN)
+ V
DROPOUT
Note 3:
When using BST to drive loads other than LTC3026s, the load
must be high impedance during start-up (i.e. prior to PG going high).
Note 4:
PG threshold expressed as a percentage difference from the “V
ADJ
Regulation Voltage” as given in the table.
Note 5:
Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.
Note 6:
Dropout voltage is minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout, the
output voltage will be equal to V
IN
– V
DROPOUT
.
Note 7:
To maintain correct regulation
V
OUT
≤
V
BST
– 2.4V
(BOOST ENABLED or DISABLED)
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25
°
C.
V
IN
= 1.5V, V
OUT
= 1.2V, C
IN
= C
BST
= 1
μ
F, C
OUT
= 10
μ
F (all capacitors ceramic) unless otherwise noted.
SYMBOL
V
IN
I
IN
I
INSHDN
V
BST
V
BSTUVLO
I
BST
I
BSTSHDN
PARAMETER
Operating Voltage
Operating Current
Shutdown Current
Boost Operating Voltage (Note 7)
Undervoltage Lockout
Boost Operating Current
Boost Shutdown Current
CONDITIONS
(Note 2)
I
OUT
= 100
μ
A, V
SHDN
= V
IN
, 1.2V
≤
V
IN
≤
5V
V
SHDN
= 0V, V
IN
= 3.5V
V
SHDN
= V
IN
MIN
1.14
TYP
MAX
5.5
200
20
5.5
4.4
275
5
UNITS
●
V
●
95
0.6
5
4.25
175
1
μ
A
μ
A
V
V
μ
A
μ
A
●
●
4.5
4.0
●
I
OUT
= 100
μ
A, V
SHDN
= V
IN
V
SHDN
= 0V
●
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