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参数资料
| 型号： | LTC2927CDDB#TRM |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | 3 X 2 MM, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件页数： | 10/16页 |
| 文件大小： | 264K |
| 代理商： | LTC2927CDDB#TRM |
LTC2927
3
2927fb
TEMPERATURE (°C)
–50
770
V
TRACK
(mV)
780
790
800
810
820
–25
0
25
50
2927 G03
75
100
VCC (V)
4.45
I CC
(mA)
4.50
4.55
4.60
4.65
4.70
2927 G02
2.5
3.0
3.5
4.0
4.5
6.0
5.5
5.0
ITRACK = IFB = –1mA
IRAMBUF = –2mA
VCC (V)
2.5
500
I CC
(μA)
550
600
650
700
750
3.0
3.5
4.0
4.5
2927 G01
6.0
5.5
5.0
ITRACK = IFB = 0mA
IRAMBUF = 0mA
ICC vs VCC
VTRACK vs Temperature
The
l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. 2.9V < VCC < 5.5V unless otherwise noted (Note 2).
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: All currents into the device pins are positive; all currents out of
device pins are negative. All voltages are referenced to ground unless
otherwise specied.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC
Supply Voltage
l
2.9
5.5
V
ICC
Supply Current
IFB = 0mA, ITRACK = 0mA
l
0.25
0.56
1.2
mA
IFB = –1mA, ITRACK = –1mA, IRAMPBUF = –1mA
l
3
3.6
4.2
mA
VCC(UVLO)
Supply Undervoltage Lockout
VCC Rising
l
2.2
2.5
2.7
V
ΔVCC(UVHYST)
Supply Undervoltage Lockout Hysteresis
25
mV
VON(TH)
ON Pin Threshold Voltage
VON Rising
l
1.210
1.230
1.250
V
ΔVON(HYST)
ON Pin Hysteresis
l
30
75
150
mV
ION
ON Pin Input Current
VON = 1.2V, VCC = 5.5V
l
0
±100
nA
IRAMP
RAMP Pin Input Current
0V < VRAMP < VCC, Ramp On
–9
–10
–11
μA
0V < VRAMP < VCC, Ramp Off
9
10
11
μA
VRAMPBUF(OL)
RAMPBUF Output Low Voltage
IRAMPBUF = 1mA
l
20
100
mV
VRAMPBUF(OH)
RAMPBUF Output High Voltage,
VRAMPBUF(OH) = VCC – VRAMPBUF
IRAMPBUF = –1mA
l
45
150
mV
VOS
Ramp Buffer Offset,
VOS = VRAMPBUF – VRAMP
VRAMP = VCC/2, IRAMPBUF = 0mA
–30
0
30
mV
IERROR(%)
IFB to ITRACK Current Mismatch
IERROR(%) = (IFB – ITRACK)/ITRACK
ITRACK = –10μA
l
0±5
%
ITRACK = –1mA
l
0±5
%
VTRACK
TRACK Pin Voltage
ITRACK = –10μA
l
0.77
0.800
0.82
V
ITRACK = –1mA
l
0.77
0.800
0.82
V
IFB(LEAK)
FB Pin Leakage Current
VFB = 2V, VCC = 5.5V
l
±1
±100
nA
VFB(CLAMP)
FB Pin Clamp Voltage
1μA < IFB < 1mA
l
1.5
2
2.3
V
VSDO(OL)
SDO Output Low Voltage
ISDO = 1mA, VCC = 2.3V
l
0.1
0.4
V
ELECTRICAL CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS
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