LTC3108 Linear Technology, LTC3108 Datasheet - Page 3

• Manufacturer Part Number: LTC3108
• Description: Ultralow Voltage Step-Up Converter and Power Manager
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
junction temperature range of –40°C to 85°C, otherwise specifi cations are at T
PARAMETER
Minimum Start-Up Voltage
No-Load Input Current
Input Voltage Range
Output Voltage
V
VAUX Quiescent Current
LDO Output Voltage
LDO Load Regulation
LDO Line Regulation
LDO Dropout Voltage
LDO Current Limit
V
VSTORE Current Limit
VAUX Clamp Voltage
VSTORE Leakage Current
V
VS1, VS2 Threshold Voltage
VS1, VS2 Input Current
PGOOD Threshold (Rising)
PGOOD Threshold (Falling)
PGOOD V
PGOOD V
PGOOD Pull-Up Resistance
V
V
V
V
V
V
V
N-Channel MOSFET On-Resistance
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3108E is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
OUT
OUT
OUT2
OUT2_EN
OUT2_EN
OUT2
OUT2
OUT2
OUT2
OUT2
Quiescent Current
Current Limit
Leakage Current
Turn-On Time
Turn-Off Time
Current Limit
Current Limit Response Time
P-Channel MOSFET On-Resistance
OL
OH
Threshold Voltage
Pull-Down Resistance
CONDITIONS
Using 1:100 Transformer Turns Ratio
Using 1:100 Transformer Turns Ratio; V
V
Using 1:100 Transformer Turns Ratio
VS1 = VS2 = GND
VS1 = VAUX, VS2 = GND
VS1 = GND, VS2 = VAUX
VS1 = VS2 = VAUX
V
No Load, All Outputs Charged
0.5mA Load
For 0mA to 2mA Load
For VAUX from 2.5V to 5V
I
Current into VAUX = 5mA
VSTORE = 5V
V
VS1 = VS2 = 5V
Measured Relative to the V
Measured Relative to the V
Sink Current = 100μA
Source Current = 0
V
(Note 3)
(Note 3)
V
C2 = 5V (Note 3)
LDO
OUT2_EN
OUT
OUT2
OUT2_EN
OUT
= 2mA
= 3.3V, V
= 3.3V (Note 3)
= 0V, V
= 0V; All Outputs Charged and in Regulation
Rising
OUT2_EN
OUT2_EN
The
= 0V
= 0V
l
OUT
OUT
denotes the specifi cations which apply over the specifi ed operating
Voltage
Voltage
with statistical process controls. The LTC3108I is guaranteed to meet
specifi cations over the full –40°C to 85°C operating temperature range.
Note 3: Specifi cation is guaranteed by design and not 100% tested in
production.
Note 4: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
43°C/W.
IN
A
= 20mV,
= 25°C. VAUX = 5V, unless otherwise noted.
l
l
l
l
l
l
l
l
l
l
l
V
STARTUP
3.234
4.018
2.156
2.30
4.90
MIN
0.4
2.1
0.4
0.2
3
5
2.350
3.300
4.100
5.000
0.01
5.25
0.85
0.01
0.15
TYP
100
350
0.4
2.2
0.5
4.5
4.5
0.1
0.3
2.2
0.3
1.3
0.5
20
–7
–9
3
6
4
1
1
1
5
5
LTC3108
3.366
4.182
2.244
MAX
2.40
5.10
0.02
500
200
5.5
1.2
0.1
0.5
2.3
1.3
0.5
50
1
6
7
7
UNITS
3
3108p
MΩ
MΩ
mV
mA
mV
mV
mA
mA
mA
μA
μA
μA
μA
μA
μs
μs
ns
%
%
%
%
Ω
Ω
V
V
V
V
V
V
V
V
V
V
A