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参数资料
| 型号： | LTC4012IUF-2#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING 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： | 381K |
| 代理商： | LTC4012IUF-2#PBF |
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LTC4012/
LTC4012-1/LTC4012-2
4012fa
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
RIN
SHDN Pull-Down Resistance
40
k
Ω
ICLPS
CLP Shutdown Current
CLP = 12V, DCIN = 0V
SHDN = 0V
l
15
350
26
500
A
ILEAK-BAT
BAT Leakage Current
SHDN = 0V or DCIN = 0V,
0V ≤ CSP = CSN = BAT ≤ 18V
l
–1.5
0
1.5
A
ILEAK-CSN
CSN Leakage Current
SHDN = 0V or DCIN = 0V,
0V ≤ CSP = CSN = BAT ≤ 20V
l
–1.5
0
1.5
A
ILEAK-CSP
CSP Leakage Current
SHDN = 0V or DCIN = 0V,
0V ≤ CSP = CSN = BAT ≤ 20V
l
–1.5
0
1.5
A
ILEAK-SW
SW Leakage Current
SHDN = 0V or DCIN = 0V,
0V ≤ SW ≤ 20V
l
–1
0
2
A
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
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
Float Voltage Select Inputs (LTC4012-1/LTC4012-2 Only)
VIL
Input Voltage Low
0.5
V
VIH
Input Voltage High
3.5
V
IIN
Input Current
0V ≤ VIN ≤ 5V
–10
10
A
Indicator Outputs
VOL
Output Voltage Low
ILOAD = 100A, PROG = 1.2V
500
mV
ILEAK
Output Leakage
SHDN = 0V, DCDIV = 0V,
VOUT = 20V
l
–10
10
A
IC10
CHRG C/10 Current Sink
CHRG = 2.5V
l
15
25
38
A
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