參數(shù)資料
型號: LTC1751-5
廠商: Linear Technology Corporation
英文描述: Micropower, Regulated Charge Pump DC/DC Converters
中文描述: 微功耗,穩(wěn)壓電荷泵DC / DC轉(zhuǎn)換器
文件頁數(shù): 3/12頁
文件大?。?/td> 211K
代理商: LTC1751-5
3
LTC1751/LTC1751-3.3/LTC1751-5
The
G
denotes specifications which apply over the full specified
temperature range, otherwise specifications are at T
A
= 25
°
C. C
FLY
= 1
μ
F, C
IN
= 10
μ
F, C
OUT
= 10
μ
F unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
LTC1751-3.3/LTC1751-5
UVL
PGOOD Undervoltage Low Threshold
Relative to Regulated V
OUT
(Note 6)
UVH
PGOOD Undervoltage High Threshold
Relative to Regulated V
OUT
(Note 6)
V
OL
PGOOD Low Output Voltage
I
PGOOD
= –500
μ
A
I
OH
PGOOD High Output Leakage
V
PGOOD
= 5.5V
LTC1751/LTC1751-3.3/LTC1751-5
I
SHDN
Shutdown Supply Current
V
IN
3.6V, V
OUT
= 0V, V
SHDN
= 0V
3.6V < V
IN
, V
OUT
= 0V, V
SHDN
= 0V
V
IH
SHDN Input Threshold (High)
V
IL
SHDN Input Threshold (Low)
I
IH
SHDN Input Current (High)
SHDN = V
IN
I
IL
SHDN Input Current (Low)
SHDN = 0V
t
r
V
OUT
Rise Time
V
IN
= 3V, I
OUT
= 0mA, 10% to 90% (Note 6)
f
OSC
Switching Frequency
Oscillator Free Running
ELECTRICAL CHARACTERISTICS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
Based on long term current density limitations.
Note 3:
The LTC1751EMS8-X is guaranteed to meet performance
specifications from 0
°
C to 70
°
C. Specifications over the –40
°
C to 85
°
C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4:
The no load input current will be approximately I
CC
plus twice the
standing current in the resistive output divider.
Note 5:
R
OUT
(2V
IN
– V
OUT
)/I
OUT
.
Note 6:
See Figure 2.
TYPICAL PERFOR U
(LTC1751-3.3)
Output Voltage vs Load Current
LOAD CURRENT (mA)
0
3.20
O
3.25
3.30
3.35
3.40
25
50
75
100
1751 G01
125
150
T
A
= 25
°
C
C
FLY
= 1
μ
F
V
IN
= 2V
V
IN
= 2.5V
INPUT VOLTAGE (V)
2.0
O
3.30
3.35
4.0
1751 G02
3.25
3.20
2.5
3.0
3.5
4.5
3.40
I
OUT
= 40mA
C
FLY
= 1
μ
F
C
OUT
= 10
μ
F
T
A
= –40
°
C
T
A
= 85
°
C
T
A
= 25
°
C
INPUT VOLTAGE (V)
2.0
S
μ
A
20
30
4.0
1751 G03
10
0
2.5
3.0
3.5
4.5
40
I
OUT
= 0mA
C
FLY
= 1
μ
F
V
SHDN
= V
IN
T
A
= 85
°
C
T
A
= 25
°
C
T
A
= –40
°
C
Output Voltage vs Input Voltage
No Load Supply Current
vs Input Voltage
MIN
TYP
MAX
UNITS
G
–11
–8
–7
–4.5
–3
–2
0.4
1
%
%
V
μ
A
G
G
G
G
G
0.01
2
5
μ
A
μ
A
V
V
μ
A
μ
A
sec
kHz
G
1.5
G
0.3
1
1
G
–1
–1
G
0.6ms/nF C
SS
800
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