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参数资料
型号： LTC4012IUF-3#PBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： BATTERY CHARGE CONTROLLER, 633 kHz SWITCHING FREQ-MAX, PQCC20
封装： 4 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-220WGGD-1, QFN-20
文件页数： 23/28页
文件大小： 369K
代理商： LTC4012IUF-3#PBF
40123fb
LTC4012-3
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INTVDD Regulator
INTVDD
Output Voltage
No Load
l
4.85
5
5.15
V
VDD
Load Regulation
IDD = 20mA
–0.4
–1
%
IDD
Short-Circuit Current (Note 5)
INTVDD = 0V
50
85
130
mA
Switching Regulator
VACP
AC Present Charge Enable Threshold Voltage
DCIN – BAT, DCIN Rising
C-Grade
I-Grade
l
350
300
500
650
700
mV
IITH
ITH Current
ITH = 1.4V
–40/+90
A
fTYP
Typical Switching Frequency
467
550
633
kHz
fMIN
Minimum Switching Frequency
CLOAD = 3.3nF
20
25
kHz
DCMAX
Maximum Duty Cycle
CLOAD = 3.3nF
98
99
%
tR-TG
TGATE Rise Time
CLOAD = 3.3nF, 10% – 90%
60
110
ns
tF-TG
TGATE Fall Time
CLOAD = 3.3nF, 90% – 10%
50
110
ns
tR-BG
BGATE Rise Time
CLOAD = 3.3nF, 10% – 90%
60
110
ns
tF-BG
BGATE Fall Time
CLOAD = 3.3nF, 90% – 10%
60
110
ns
tNO
TGATE, BGATE Non-Overlap Time
CLOAD = 3.3nF, 10% – 10%
110
ns
PowerPath Control
IDCIN
DCIN Input Current
0V ≤ DCIN ≤ CLP
l
–10
60
A
VFTO
Forward Turn-On Voltage (DCIN Detection Threshold) DCIN-CLP, DCIN Rising
l
15
60
mV
VFR
Forward Regulation Voltage
DCIN-CLP
l
15
25
35
mV
VRTO
Reverse Turn-Off Voltage
DCIN-CLP, DCIN Falling
l
–45
–25
–15
mV
VOL(INFET) INFET Output Low Voltage, Relative to CLP
DCIN-CLP = 0.1V, IINFET =1A
–6.5
–5
V
VOH(INFET) INFET Output High Voltage, Relative to CLP
DCIN-CLP = –0.1V, IINFET =–5A
–250
250
mV
tIF(ON)
INFET Turn-On Time
To CLP-INFET > 3V, CINFET = 1nF
85
180
s
tIF(OFF)
INFET Turn-Off Time
To CLP-INFET < 1.5V, CINFET = 1nF
2.5
6
s
Indicator Outputs
VOL
Output Voltage Low
ILOAD = 100A, PROG = 1.2V
500
mV
ILEAK
Output Leakage
SHDN = 0V, DCIN = 0V, VOUT = 20V
l
–10
10
A
IC10
CHRG C/10 Current Sink
CHRG = 2.5V
l
15
25
38
A
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 TJ (in °C) is calculated from
the ambient temperature TA and the total continuous package power
dissipation PD (in watts) by the formula TJ = TA + (θJA 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.
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