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參數(shù)資料
| 型號(hào)： | LTC4259CGW |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36 |
| 封裝： | 0.300 INCH, PLASTIC, SSOP-36 |
| 文件頁(yè)數(shù)： | 23/32頁(yè) |
| 文件大?。?/td> | 324K |
| 代理商： | LTC4259CGW |
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LTC4259
3
4259i
ELECTRICAL CHARACTERISTICS The q denotes the specificatiions which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDD = 3.3V, VEE = –48V unless otherwise noted (Note 5).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Gate Driver
IGON
GATE Pin Current
Gate On, VGATEn = VEE
q
–30
–50
–70
A
IGOFF
GATE Pin Current
Gate Off, VGATEn = VEE + 5V
q
30
50
80
A
IGPD
GATE Pin Short-Circuit Pull-Down
VGATEn = VEE + 5V
100
mA
VGATE
External Gate Voltage (VGATEn – VEE)IGATE = – 1A
q
10
13
15
V
Output Voltage Sense
VPG
Power Good Threshold Voltage
VOUTn – VEE
q
123
V
IVOUT
Out Pin Bias Current
0V > VOUT > –10V
–6
A
–10V > VOUT > –30V
–18
A
VOUT = –48V
–20
A
Current Sense
VCUT
Overcurrent Detection Sense Voltage
VSENSEn – VEE, VOUT = VEE
q
175
187.5
200
mV
VLIM
Current Limit Sense Voltage
VSENSEn – VEE, VOUT = VEE
q
200
212.5
225
mV
VMIN
DC Disconnect Sense Voltage
VSENSEn – VEE
q
2.5
3.75
5
mV
VSC
Short-Circuit Sense Voltage
275
mV
ISENSE
SENSE Pin Bias Current
VSENSEn = VEE
–40
A
AC Disconnect (Note 7)
ROSCIN
Input Impedance of OSCIN Pin
–0.3V < VSINEIN < 3.3V, fOSC < 200Hz
q
200
300
k
AVACD
Voltage Gain OSCIN to DETECT1, 2
Channel Powered, PD Not Present
q
–2.7
–3
–3.3
V/V
Voltage Gain OSCIN to DETECT3, 4
Channel Powered, PD Not Present
q
2.7
3
3.3
V/V
IACDMAX
AC Disconnect DETECT
n Output Current
Channel Powered, VDETECTn =
q
±600
A
IACDMIN
Remain Connected DETECT
n Current
Channel Powered, VDETECTn = 3.4V
q
150
200
250
A
Digital Interface
VOLD
Digital Output Low Voltage
SDAOUT, INT, IPIN = 10mA
q
0.4
V
VILD
Digital Input Low Voltage
SCL, SDAIN
q
0.8
V
VIHD
Digital Input High Voltage
SCL, SDAIN
q
2.4
V
RPU
Pull-Up Resistor to VDD
AD0 to AD3, RESET, SHDN
n
50
k
RPD
Pull-Down Resistor to DGND
AUXIN, AUTO
50
k
AC Characteristics
tDETDLY
Detection Delay
From Detect Command or Application of PD to Port
q
170
590
ms
to Detect Complete (Figure 2)
tCLSDLY
Classification Delay
From Successful Detect in Auto or Semiauto Mode
q
10.1
52
ms
to Class Complete (Figure 2)
From Classify Command in Manual Mode to Class
q
10.1
420
ms
Complete
tCLASS
Classification Duration
(Figure 2)
q
10.1
13
ms
tPON
Power On Delay, Auto Mode
From Valid Detect to Port On in Auto Mode (Figure 2)
q
90
ms
From Port On Command to GATE Pin Current = IGON
q
1ms
tSTART
Maximum Current Limit Duration During
tSTART1 = 0, tSTART0 = 0 (Figure 3)
q
50
60
70
ms
Port Start-Up
tSTART1 = 0, tSTART0 = 1
q
25
30
35
ms
tSTART1 = 1, tSTART0 = 0
q
100
120
140
ms
tSTART1 = 1, tSTART0 = 1
q
200
240
280
ms
tICUT
Maximum Current Limit Duration After
tICUT1 = 0, tICUT0 = 0 (Figure 3)
q
50
60
70
ms
Port Start-Up
tICUT1 = 0, tICUT0 = 1
q
25
30
35
ms
tICUT1 = 1, tICUT0 = 0
q
100
120
140
ms
tICUT1 = 1, tICUT0 = 1
q
200
240
280
ms
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