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参数资料
| 型号： | LTC3552EDHC-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATT LI-ION 16-DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.25 V ~ 8 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFDFN 裸露焊盘 |
| 供应商设备封装： | 16-DFN（5x3） |
| 包装： | 带卷 (TR) |
LTC3552-1
ELECTRICAL CHARACTERISTICS
The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 5V, V CC = 3.6V unless otherwise noted.
SYMBOL
V PROG
V CHRG
V PWR
Δ V RECHRG
PARAMETER
PROG Pin Voltage
CHRG Pin Output Low Voltage
PWR Pin Output Low Voltage
Recharge Battery Threshold Voltage
CONDITIONS
R PROG = 10k, Current Mode
I CHRG = 5mA
I PWR = 5mA
V FLOAT – V RECHRG , 0°C < T A < 85°C
MIN
0.93
60
TYP
1
0.35
0.35
100
MAX
1.07
0.6
0.6
140
UNITS
V
V
V
mV
T LIM
Junction Temperature in Constant-
120
°C
Temperature Mode
R ON-CHRG
Charger’s Power FET “ON” Resistance
600
m Ω
(Between V IN and BAT)
t SS-CHRG
Charger Soft-Start Time
I BAT = 0 to I BAT = 1000V/R PROG
100
μs
t RECHRG
t TERM
Recharge Comparator Filter Time
Termination Comparator Filter Time
V BAT High to Low
I BAT Drops Below Charge Termination
0.75
0.4
2
1
4.5
2.5
ms
ms
Threshold
Switching Regulator
V CC
Operating Voltage Range for Converter
●
2.5
5.5
V
V OUT1
V OUT2
Δ V LINE_REG
Output Voltage Feedback of Regulator 1
Output Voltage Feedback of Regulator 2
Reference Voltage Line Regulation
0°C ≤ T A ≤ 85°C (Note 5)
–40°C ≤ T A ≤ 85°C (Note 5)
0°C ≤ T A ≤ 85°C (Note 5)
–40°C ≤ T A ≤ 85°C (Note 5)
V CC = 2.5V to 5.5V (Note 5)
●
●
1.764
1.755
1.544
1.536
1.8
1.8
1.575
1.575
0.3
1.836
1.836
1.607
1.607
0.5
V
V
V
V
%/V
Δ V LOAD_REG
Output Voltage Load Regulation
(Note 5)
0.5
%
I S
Input DC Supply Current (Note 6)
Active Mode
Sleep Mode
Shutdown
V OUT1 = 1.5V, V OUT2 = 1.3V
V OUT1 = 1.89V, V OUT2 = 1.65V
RUN = 0V, V CC = 5.5V
700
40
0.1
950
60
1
μA
μA
μA
f OSC
I LIM
Oscillator Frequency
Peak Switch Current Limit Regulator 1
Peak Switch Current Limit Regulator 2
V OUT1 = 1.8V, V OUT2 = 1.575V
V CC = 3V, Duty Cycle < 35%
V CC = 3V, Duty Cycle < 35%
●
1.8
0.95
0.6
2.25
1.2
0.7
2.7
1.6
0.9
MHz
A
A
R DS(ON)
Converter Top Switch On-Resistance (Note 7)
Converter Bottom Switch On-Resistance (Note 7)
0.35
0.3
0.45
0.45
Ω
Ω
I SW(LKG)
Switch Leakage Current
V CC = 5V, V RUN = 0V, V FB = 0V
0.01
1
μA
V RUN
I RUN
RUN Threshold Voltage
RUN Leakage Current
●
●
0.3
1
0.01
1.5
1
V
μA
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 LTC3552E-1 is guaranteed to meet performance speci?cations
from 0°C to 85°C Speci?cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Failure to solder the exposed backside of the package to the PC
board will result in a thermal resistance much higher than 40°C/W. See
Thermal Considerations.
Note 5: The converter is tested in a proprietary test mode that connects
the output of the error ampli?er to the SW pin, which is connected to an
external servo loop.
Note 6: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 7: The regulator power switch on-resistances are guaranteed by
correlation to wafer level measurements.
Note 8: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
T J = T A + (P D ? θ JA )
Note 4 : Supply current includes PROG pin current and ITERM pin current
(approximately 100μA each) but does not include any current delivered to
the battery through the BAT pin (approximately 100mA).
35521fa
3
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