LTC4425 Linear Technology, LTC4425 Datasheet - Page 4

• Manufacturer Part Number: LTC4425
• Description: Linear SuperCap Charger
• Manufacturer: Linear Technology

LTC4425
ELECTRICAL CHARACTERISTICS
junction temperature range, otherwise specifi cations are at T
SYMBOL PARAMETER
Leakage Balancer
V
PFO, PFI_RET, PFI
V
I
Logic Inputs (EN, SEL)
V
V
I
I
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 current limit features of this part are intended to protect the
IC from short term or intermittent fault conditions. Continuous operation
above the maximum specifi ed pin current rating may result in device
degradation or failure.
Note 3: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much greater than
43°C/W on the DD package and greater than 35°C C/W on MSE package.
4
PFI
IH
IL
MID
PFI
IL
IH
V
V
V
Output Low Voltage (PFO, PFI_RET)
Pin Leakage Current (PFO, PFI_RET)
FB Threshold Voltage for Power Good (Rising)
Input-to-Output Differential for Power Good (Rising) Normal Mode
PFI Threshold (Falling)
PFI Hysteresis
PFI Pin Input Leakage
Power Good Timer Delay
Logic Low Input Voltage
Logic High Input Voltage
Input Current High
Input Current Low
MID
MID
MID
Output Voltage
Maximum Current Sourcing Capability
Maximum Current Sinking Capability
CONDITIONS
V
V
V
I
V
LDO Mode
EN, SEL Pins at 5.5V
EN, SEL Pins at GND
PIN
The
OUT
MID
MID
PIN
A
= 5mA
= 5V, EN = 0
= 3.6V
< V
> V
= T
l
denotes the specifi cations which apply over the full operating
OUT/2
OUT/2
J
= 25°C, V
, V
, V
Note 4: The LTC4425E (E grade) is guaranteed to meet specifi cations
from 0°C to 85°C junction temperature. Specifi cations over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC4425I (I grade) is guaranteed over the full –40°C to 125°C operating
junction temperature range. The junction temperature, T
from the ambient temperature, T
the formula:
Note that the maximum ambient temperature is determined by specifi c
operating conditions in conjunction with board layout, the rated thermal
package thermal resistance and other environmental factors.
Note 5: V
junction temperature approaches 105°C.
MID
MID
T
J
= T
< V
< V
IN
A
IN
CLAMP
CLAMP
= 3.8V. (Note 4)
+ (P
to V
D
OUT
• θ
JA
charge current is reduced by thermal foldback as
°C/W).
l
l
l
l
l
l
A
, and power dissipation, P
MIN
1.76
1.09
1.18
1.2
–1
–1
www.DataSheet4U.com
1.11
TYP
265
100
200
1.8
0.7
1.2
1.2
65
10
J
, is calculated
MAX
1.84
1.13
1.22
100
0.4
1
1
1
D
, according to
UNITS
4425p
mA
mA
mV
mV
mV
ms
μA
nA
μA
μA
V
V
V
V
V