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| 型号： | LT1571EGN-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATT CONST V/I 16SSOP |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 铅酸，锂离子，镍镉，镍氢 |
| 电源电压： | 8 V ~ 26 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
LT1571 Series
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25 ° C.
V CC = 16V (LT1571-1, LT1571-2), V CC = 10V (LT1571-5), V BAT = 8V (LT1571-1,LT1571-2), V BAT = 4V (LT1571-5), no load on any
outputs unless otherwise noted. (Note 6)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switch
Switch ON Resistance
? I BOOST / ? I SW During Switch ON
Switch OFF Leakage Current
Maximum V BAT with Switch ON
Minimum I PROG for Switch ON
Minimum I PROG for Switch OFF
I SW = 1.5A, V BOOST – V SW ≥ 2V
I SW = 1A, V BOOST – V SW < 2V (Unboosted)
V BOOST = (V CC + 8V), I SW ≤ 1A
V SW = 0V, V CC ≤ 20V
V SW = 0V, 20V < V CC ≤ 26V
q
q
q
q
1
1
0.3
20
2
4
4
2.4
0.5
2.0
35
100
200
V CC – 2
27
?
?
mA/A
μ A
μ A
V
μ A
mA
Current Sense Amplifier Inputs (SENSE, BAT)
Sense Resistance (R S1 )
Total Resistance from SENSE to BAT (Note 3)
0.08
0.2
0.12
0.25
?
?
BAT Bias Current (Note 4)
V C < 0.3V
V C > 0.6V
V C < 40mV
q
– 200
700
– 375
1300
5
μ A
μ A
μ A
Oscillator
Switching Frequency
LT1571-1, LT1571-2
LT1571-5
180
440
200
500
220
550
kHz
kHz
Switching Frequency Tolerance
All Conditions of V CC , Temperature,
LT1571-1, LT1571-2
LT1571-1, LT1571-2, T J < 0 ° C
LT1571-5
LT1571-5, T J < 0 ° C
q
q
170
160
425
400
200
500
230
230
575
575
kHz
kHz
kHz
kHz
Maximum Duty Cycle
LT1571-1, LT1571-2
LT1571-1, LT1571-2, T A = 25 ° C (Note 7)
LT1571-5
q
q
87
90
77
93
81
%
%
%
Current Amplifier (CA2)
Transconductance
Maximum V C for Switch OFF
I VC Current (Out of Pin)
V C = 1V, I VC = ± 1 μ A
V C ≥ 0.6V
q
125
210
550
0.6
100
μ mho
V
μ A
0.2V < V C < 0.45V
V C < 40mV (Shutdown)
3
300
mA
μ A
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 S1 and package bond wires.
Note 4: Current ( ≈ 700 μ A) flows into the pins during normal operation and
also when an external shutdown signal on the V C pin is greater than 0.3V.
Current decreases to ≈ 200 μ A and flows out of the pins when external
shutdown holds the V C pin below 0.3V but above shutdown threshold.
Current drops to near zero when input voltage collapses. See External
Shutdown in Applications Information section.
4
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 BAT or V X
(see Figure 8 in Application Information) is kept between 3V and 5V.
Note 8: See “Lithium-Ion Charging Completion” in the Applications
Information section.
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| LT1572CS | 功能描述:IC REG MULTI CONFIG 1.25A 16SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1572CS#PBF | 功能描述:IC REG MULTI CONFIG 1.25A 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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