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参数资料
| 型号： | DC1029A |
| 厂商： | Linear Technology |
| 文件页数： | 4/32页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR LTC2928 |
| 设计资源： | DC1029A Design File DC1029A Schematic |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电源监控器/跟踪器/序列发生器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | LTC2928 |
| 主要属性： | 4 通道电源定序器 |
| 已供物品： | 板 |
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LTC2928
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C, V CC = 3.3V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Sequence Time Position Control Inputs: RT1, RT2, RT3, RT4 (see resistor selection Table 3)
V RT(LO)
V RT(HI)
Voltage Required to Force Enable Pin
Low While Sequencing
Voltage Required to Force Enable Pin
High Outside of Sequencing
●
● 0.955 ? V CC
0.045 ? V CC
V
V
R RT
R T Pin Input Resistance
●
11.2
12
12.8
k ?
Cascade Pin: CAS
V CAS(OL)
CAS Voltage Output Low
I CAS = 2.5mA
●
0.15
0.3
V
I CAS(UP)
t CAS(HI)
t CAS(MIN)
CAS Pull-Up Current
Fixed Time Delay between Sequence
Time Positions (Note 5)
Minimum CAS Low Time During
Sequencing
Master Pulling CAS High, V CAS = GND
CAS High, C STMR = 1500pF
●
●
●
–45
11
15
–60
13
22.5
–75
15
30
μ A
ms
μ s
Fault Status Pin: FLT
V FLT(OL)
FLT Voltage Output Low
I FLT = 2.5mA
●
0.15
0.3
V
I FLT(UP)
V FLT(TH)
V FLT(HYST)
FLT Pull-Up Current
External Fault Input Threshold
External Fault Input Hysteresis
V FLT = V CC –1V
V FLT Falling
●
●
●
–12
1.0
25
–17
1.1
100
–22
1.2
150
μ A
V
mV
t FLT
Minimum Detectable External Fault
Pulse Width
2
μ s
I FLT(LKG)
Fault Pin Leakage Current
V FLT = V CC
●
±1
μ A
Done Status Pin: DONE
V DONE(OL)
I DONE(DN)
R DONE
V DONE(LAST)
DONE Voltage Output Low
DONE Pull-Down Current
Required Pull-Up Resistance on “Last”
LTC2928
Voltage Output High when Configured
as “Last”
I DONE = 2.5mA
V DONE = 3.3V (Note 6)
5% Tolerance or Better
●
●
●
●
2.4
0.8 ? V CC
0.15
20
0.3
40
5.1
V
μ A
k ?
V
Reset Pin: RST
V RST(OL)
V RST(OH)
RST Voltage Output Low
RST Voltage Output High
V CC = 0.2V, I RST = 0.1 μ A
V CC = 0.5V, I RST = 5 μ A
V CC = 1V, I RST = 200 μ A
V CC = 3V, I RST = 2500 μ A
I RST = –1 μ A (Note 7)
●
●
●
●
●
V CC – 1
5
10
25
150
60
150
300
300
mV
mV
mV
mV
V
Timer Pins: RTMR, PTMR, STMR
I TMR(UP)
I TMR(DN)
t RTMR
t PTMR
t STMR
Timer Pull-Up Current
Timer Pull-Down Current
Timer Period, RTMR (Note 8)
Timer Period, PTMR
Timer Period, STMR
V TMR = GND
V TMR = 1.3V
C RTMR = 1500pF
C PTMR = 1500pF
C STMR = 1500pF
●
●
●
●
●
–1.7
15
5
5
11
–2
20
6
6
13
–2.3
25
7
7
15
μ A
μ A
ms
ms
ms
2928f
4
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