LT1571EGN-1#TR Linear Technology, LT1571EGN-1#TR Datasheet - Page 4

• Manufacturer Part Number: LT1571EGN-1#TR
• Description: IC CHARGER BATT CONST V/I 28SSOP
• Manufacturer: Linear Technology

Specifications of LT1571EGN-1#TR

• Function: Charge Management
• Battery Type: Lead Acid, Li-Ion, NiCd, NiMH
• Voltage - Supply: 8 V ~ 26 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP (0.150", 3.95mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LT1571 Series
ELECTRICAL CHARACTERISTICS
The
V
outputs unless otherwise noted. (Note 6)
PARAMETER
Switch
Switch ON Resistance
Switch OFF Leakage Current
Maximum V
Minimum I
Minimum I
Current Sense Amplifier Inputs (SENSE, BAT)
Sense Resistance (R
Total Resistance from SENSE to BAT (Note 3)
BAT Bias Current (Note 4)
Oscillator
Switching Frequency
Switching Frequency Tolerance
Maximum Duty Cycle
Current Amplifier (CA2)
Transconductance
Maximum V
I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1571 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 3: Sense resistor R
Note 4: Current ( 700 A) flows into the pins during normal operation and
also when an external shutdown signal on the V
Current decreases to 200 A and flows out of the pins when external
shutdown holds the V
Current drops to near zero when input voltage collapses. See External
Shutdown in Applications Information section.
4
VC
CC
I
BOOST
Current (Out of Pin)
= 16V (LT1571-1, LT1571-2), V
denotes specifications which apply over the full operating temperature range, otherwise specifications are T A = 25 C.
/ I
SW
PROG
PROG
BAT
C
for Switch OFF
During Switch ON
with Switch ON
for Switch ON
for Switch OFF
S1
C
)
pin below 0.3V but above shutdown threshold.
S1
and package bond wires.
CC
= 10V (LT1571-5), V
C
pin is greater than 0.3V.
CONDITIONS
I
I
V
V
V
V
V
V
LT1571-1, LT1571-2
LT1571-5
All Conditions of V
LT1571-1, LT1571-2
LT1571-1, LT1571-2, T
LT1571-5
LT1571-5, T
LT1571-1, LT1571-2
LT1571-1, LT1571-2, T
LT1571-5
V
V
0.2V < V
V
SW
SW
BOOST
SW
SW
C
C
C
C
C
C
< 0.3V
> 0.6V
< 40mV
= 1V, I
< 40mV (Shutdown)
= 1.5A, V
= 1A, V
= 0V, V
= 0V, 20V < V
0.6V
= (V
C
VC
< 0.45V
BOOST
CC
CC
J
= 1 A
BOOST
BAT
< 0 C
+ 8V), I
20V
– V
= 8V (LT1571-1,LT1571-2), V
CC
CC
– V
, Temperature,
SW
SW
SW
J
A
26V
< 2V (Unboosted)
< 0 C
= 25 C (Note 7)
Note 5: A linear interpolation can be used for reference voltage
specification between 0 C and – 40 C.
Note 6: Maximum allowable ambient temperature may be limited by power
dissipation. Parts may not necessarily be operated simultaneously at
maximum power dissipation and maximum ambient temperature.
Temperature rise calculations must be done as shown in the Applications
Information section to ensure that maximum junction temperature does
not exceed the 125 C limit. With high power dissipation, maximum
ambient temperature may be less than 70 C.
Note 7: 91% maximum duty cycle is guaranteed by design if V
(see Figure 8 in Application Information) is kept between 3V and 5V.
Note 8: See “Lithium-Ion Charging Completion” in the Applications
Information section.
1A
2V
BAT
= 4V (LT1571-5), no load on any
MIN
180
440
170
160
425
400
125
87
90
77
1
1
– 200
0.08
TYP
200
500
200
500
210
0.3
2.4
0.2
20
93
81
700
2
4
4
V
– 375
1300
MAX
CC
0.12
0.25
100
200
220
550
230
230
575
575
550
100
300
0.5
2.0
0.6
35
27
5
3
– 2
BAT
or V
UNITS
mA/A
mho
X
kHz
kHz
kHz
kHz
kHz
kHz
mA
mA
%
%
%
A
A
V
A
A
A
A
V
A
A