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参数资料
| 型号： | LTC4012IUF-3#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC CTLR BATT CHARGER CC/CV 20QFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 多化学 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
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LTC4012-3
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INTV DD Regulator
INTV DD
?V DD
I DD
Output Voltage
Load Regulation
Short-Circuit Current (Note 5)
No Load
I DD = 20mA
INTV DD = 0V
l
4.85
50
5
–0.4
85
5.15
–1
130
V
%
mA
Switching Regulator
V ACP
AC Present Charge Enable Threshold Voltage
DCIN – BAT, DCIN Rising
C-Grade
I-Grade
l
l
350
300
500
650
700
mV
mV
I ITH
ITH Current
ITH = 1.4V
–40/+90
μA
f TYP
Typical Switching Frequency
467
550
633
kHz
f MIN
DC MAX
Minimum Switching Frequency
Maximum Duty Cycle
C LOAD = 3.3nF
C LOAD = 3.3nF
20
98
25
99
kHz
%
t R-TG
t F-TG
t R-BG
t F-BG
t NO
TGATE Rise Time
TGATE Fall Time
BGATE Rise Time
BGATE Fall Time
TGATE, BGATE Non-Overlap Time
C LOAD = 3.3nF, 10% – 90%
C LOAD = 3.3nF, 90% – 10%
C LOAD = 3.3nF, 10% – 90%
C LOAD = 3.3nF, 90% – 10%
C LOAD = 3.3nF, 10% – 10%
60
50
60
60
110
110
110
110
110
ns
ns
ns
ns
ns
PowerPath Control
I DCIN
V FTO
DCIN Input Current
Forward Turn-On Voltage (DCIN Detection Threshold)
0V ≤ DCIN ≤ CLP
DCIN-CLP, DCIN Rising
l
l
–10
15
60
60
μA
mV
V FR
V RTO
Forward Regulation Voltage
Reverse Turn-Off Voltage
DCIN-CLP
DCIN-CLP, DCIN Falling
l
l
15
–45
25
–25
35
–15
mV
mV
V OL(INFET)
V OH(INFET)
t IF(ON)
t IF(OFF)
INFET Output Low Voltage, Relative to CLP
INFET Output High Voltage, Relative to CLP
INFET Turn-On Time
INFET Turn-Off Time
DCIN-CLP = 0.1V, I INFET =1μA
DCIN-CLP = –0.1V, I INFET = –5μA
To CLP-INFET > 3V, C INFET = 1nF
To CLP-INFET < 1.5V, C INFET = 1nF
–6.5
–250
85
2.5
–5
250
180
6
V
mV
μs
μs
Indicator Outputs
V OL
Output Voltage Low
I LOAD = 100μA, PROG = 1.2V
500
mV
I LEAK
Output Leakage
SHDN = 0V, DCIN = 0V, V OUT = 20V
l
–10
10
μA
I C10
CHRG C/10 Current Sink
CHRG = 2.5V
l
15
25
38
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 LTC4012C-3 is guaranteed to meet performance specifications
over the 0°C to 85°C operating temperature range. The LTC4012I-3 is
guaranteed to meet performance specifications over the –40°C to 125°C
operating temperature range.
Note 3: Operating junction temperature T J (in °C) is calculated from
the ambient temperature T A and the total continuous package power
dissipation P D (in watts) by the formula T J = T A + ( θ JA ? PD). Refer to the
Applications Information section for details.
Note 4: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to GND, unless otherwise
specified.
Note 5: Output current may be limited by internal power dissipation. Refer
to the Applications Information section for details.
40123fb
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