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参数资料
| 型号： | LTC4012IUF-2#TRPBF |
| 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： | 22/28页 |
| 文件大小： | 381K |
| 代理商： | LTC4012IUF-2#TRPBF |
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4012fa
LTC4012/
LTC4012-1/LTC4012-2
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
Charge Voltage Regulation
VTOL
VBAT Accuracy (See Test Circuits)
LTC4012
C-Grade
I-Grade
l
–0.5
–0.8
–1.0
0.5
0.8
1.0
%
LTC4012-1/LTC4012-2
C-Grade
FVS1 = 0V, FVS0 = 0V, I-Grade
FVS1 = 0V, FVS1 = 5V, I-Grade
FVS1 = 5V, FVS0 = 0V, I-Grade
FVS1 = 5V, FVS1 = 5V, I-Grade
l
–0.6
–0.8
–1.1
–1.15
–1.25
–1.35
0.6
0.8
1.1
1.15
1.25
1.35
%
IVFB
VFB Input Bias Current
VFB = 1.2V
±20
nA
RON
FBDIV On Resistance
ILOAD = 100A
l
85
190
Ω
ILEAK-FBDIV FBDIV Output Leakage Current
SHDN = 0V, FBDIV = 0V
l
–1
0
1
A
VBOV
VFB Overvoltage Threshold
LTC4012
l
1.235
1.281
1.32
V
BAT Overvoltage Threshold
LTC4012-1/LTC4012-2, Relative to
Selected Output Voltage
l
103
106
109
%
Charge Current Regulation
ITOL
Charge Current Accuracy with RIN = 3.01k,
6V < BAT < 18V (LTC4012)
6V < BAT < 15V (LTC4012-1, LTC4012-2)
RPROG = 26.7k
C-Grade
I-Grade
l
–4
–5
–9.5
4
5
9.5
%
VSENSE = 0mV, PROG = 1.2V
–12.75
–11.67
–10.95
A
AI
Current Sense Amplifier Gain (PROG I) with
RIN = 3.01k, 6V < BAT < 18V (LTC4012)
6V < BAT < 15V (LTC4012-1, LTC4012-2)
VSENSE Step from 0mV to 5mV,
PROG = 1.2V
–1.78
–1.66
–1.54
A
VCS-MAX
Maximum Peak Current Sense Threshold Voltage
per Cycle (RIN = 3.01k)
ITH = 2V, C-Grade
ITH = 2V, I-Grade
ITH = 5V
l
140
125
195
325
250
265
430
mV
VC10
C/10 Indicator Threshold Voltage
PROG Falling
340
400
460
mV
VREV
Reverse Current Threshold Voltage
PROG Falling
180
253
295
mV
Input Current Regulation
VCL
Current Limit Threshold
CLP – CLN
C-Grade
I-Grade
l
97
96
92
100
103
104
108
mV
ICLN
CLN Input Bias Current
CLN = CLP
±100
nA
VICL
ICL Indicator Threshold
(CLP – CLN) – VCL
–8
–5
–2
mV
CLP Supply
OVR
Operating Voltage Range
6
28
V
VUVLO
CLP Undervoltage Lockout Threshold
CLP Increasing
l
4.65
4.85
5.25
V
VUV(HYST)
UVLO Threshold Hysteresis
200
mV
ICLPO
CLP Operating Current
CLP = 20V, No Gate Loads
2
3
mA
Shutdown
VACP
AC Present Threshold Voltage
DCIN – BAT, DCIN Rising
C-Grade
I-Grade
l
350
300
500
650
700
mV
VACP(HYST) ACP Threshold Hysteresis Voltage
200
mV
VIL
SHDN Input Voltage Low
l
300
mV
VIH
SHDN Input Voltage High
l
1.4
V
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