ltc1751 Linear Technology Corporation, ltc1751 Datasheet - Page 3

• Manufacturer Part Number: ltc1751
• Description: Micropower, Regulated Charge Pump Dc/dc Converters
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
LTC1751-3.3/LTC1751-5
UVL
UVH
V
I
LTC1751/LTC1751-3.3/LTC1751-5
I
V
V
I
I
t
f
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.
(LTC1751-3.3)
ELECTRICAL CHARACTERISTICS
OH
SHDN
IH
IL
r
OSC
OL
IH
IL
3.35
3.25
3.20
3.40
3.30
Output Voltage vs Load Current
0
T
C
A
FLY
= 25 C
= 1 F
25
PARAMETER
PGOOD Undervoltage Low Threshold
PGOOD Undervoltage High Threshold Relative to Regulated V
PGOOD Low Output Voltage
PGOOD High Output Leakage
Shutdown Supply Current
SHDN Input Threshold (High)
SHDN Input Threshold (Low)
SHDN Input Current (High)
SHDN Input Current (Low)
V
Switching Frequency
OUT
LOAD CURRENT (mA)
50
Rise Time
75
V
IN
= 2V
100
V
IN
W
= 2.5V
125
1751 G01
U
150
CONDITIONS
Relative to Regulated V
I
V
V
3.6V < V
SHDN = V
SHDN = 0V
V
Oscillator Free Running
PGOOD
PGOOD
IN
IN
3.40
3.35
3.30
3.25
3.20
= 3V, I
2.0
3.6V, V
Output Voltage vs Input Voltage
A
I
C
C
= – 500 A
OUT
= 25 C. C
= 5.5V
FLY
OUT
IN
IN
, V
OUT
= 40mA
= 1 F
= 10 F
2.5
OUT
OUT
The
= 0mA, 10% to 90% (Note 6)
= 0V, V
= 0V, V
INPUT VOLTAGE (V)
FLY
3.0
LTC1751/LTC1751-3.3/LTC1751-5
denotes specifications which apply over the full specified
= 1 F, C
OUT
OUT
SHDN
SHDN
Note 4: The no load input current will be approximately I
standing current in the resistive output divider.
Note 5: R
Note 6: See Figure 2.
(Note 6)
(Note 6)
T
3.5
A
= 0V
= 0V
= 25 C
IN
T
A
= 10 F, C
OUT
= –40 C
T
4.0
A
= 85 C
1751 G02
(2V
4.5
IN
OUT
– V
OUT
= 10 F unless otherwise noted.
)/I
40
30
20
10
OUT
0
2.0
No Load Supply Current
vs Input Voltage
.
I
C
V
MIN
–11
OUT
1.5
– 8
– 1
– 1
FLY
SHDN
= 0mA
= 1 F
2.5
0.6ms/nF • C
= V
IN
INPUT VOLTAGE (V)
– 4.5
0.01
TYP
800
– 7
3.0
T
T
T
A
A
A
= –40 C
= 85 C
= 25 C
SS
3.5
MAX
CC
0.4
0.3
– 2
–3
1
2
5
1
1
plus twice the
4.0
UNITS
1751 G03
3
kHz
sec
4.5
%
%
V
A
A
A
V
V
A
A