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參數(shù)資料
| 型號： | LTC4227CUFD-1#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| 封裝： | 4 X 5 MM, PLASTIC, MO-220, QFN-20 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 307K |
| 代理商： | LTC4227CUFD-1#TRPBF |
LTC4227-1/LTC4227-2
3
422712f
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supplies
VIN
Input Supply Range
l
2.9
18
V
IIN
Input Supply Current
l
2
4
mA
VINTVCC
Internal Regulator Voltage
l
4.5
5
5.6
V
VINTVCC(UVL)
Internal VCC Undervoltage Lockout
INTVCC Rising
l
2.1
2.2
2.3
V
VINTVCC(HYST) Internal VCC Undervoltage Lockout
Hysteresis
l
30
60
90
mV
Ideal Diode Control
VFWD(REG)
Forward Regulation Voltage
(VINn – VSENSE+)
l
10
25
40
mV
VDGATE
External N-Channel Gate Drive
(VDGATEn – VINn)
IN < 7V,
VFWD = 0.1V, I = 0, –1A
IN = 7V to 18V,
VFWD = 0.1V, I = 0, –1A
l
5
10
7
12
14
V
ICPO(UP)
CPOn Pull-Up Current
CPO = IN = 2.9V
CPO = IN = 18V
l
–60
–50
–95
–85
–120
–110
A
IDGATE(FPU)
DGATEn Fast Pull-Up Current
VFWD = 0.2V, VDGATE = 0V, CPO = 17V
–1.5
A
IDGATE(FPD)
DGATEn Fast Pull-Down Current
VFWD = –0.2V, VDGATE = 5V
1.5
A
IDGATE2(DN)
DGATE2 Off Pull-Down Current
D2ON = 2V,
VDGATE2 = 2.5V
l
40
100
200
A
tON(DGATE)
DGATEn Turn-On Delay
VFWD = 0.2V , CDGATE = 10nF
l
0.25
0.5
s
tOFF(DGATE)
DGATEn Turn-Off Delay
VFWD = –0.2V , CDGATE = 10nF
l
0.2
0.5
s
tPLH(DGATE2)
D2ON Low to DGATE2 High
l
40
100
s
Hot Swap Control
VSENSE(CB)
Circuit Breaker Trip Sense Voltage
(VSENSE+ – VSENSE–)
l
47.5
50
52.5
mV
VSENSE(ACL)
Active Current Limit Sense Voltage
(VSENSE+ – VSENSE–)
l
60
65
70
mV
VHGATE
External N-Channel Gate Drive
(VHGATE – VOUT)
IN < 7V, I = 0, –1A
IN = 7V to 18V, I = 0, –1A
l
4.8
10
7
12
14
V
VHGATE(PG)
Gate-Source Voltage for Power Good
l
3.6
4.2
4.8
V
IHGATE(UP)
External N-Channel Gate Pull-Up Current Gate Drive On, HGATE = 0V
l
–7
–10
–13
A
IHGATE(DN)
External N-Channel Gate Pull-Down
Current
Gate Drive Off
OUT = 12V , HGATE = OUT + 5V
l
150
300
500
A
IHGATE(FPD)
External N-Channel Gate Fast Pull-Down
Current
Fast Turn-Off
OUT = 12V , HGATE = OUT + 5V
l
100
200
300
mA
tPHL(SENSE)
Sense Voltage (SENSE+ – SENSE–)
High to HGATE Low
VSENSE = 300mV, CHGATE = 10nF
l
0.5
1
s
tOFF(HGATE)
EN High to HGATE Low
ON Low to HGATE Low
SENSE+ Low to HGATE Low
l
20
10
40
20
s
tD(HGATE)
ON High, EN Low to HGATE Turn-On
Delay
l
50
100
150
ms
tP(HGATE)
ON to HGATE Propagation Delay
ON = Step 0.8V to 2V
l
10
20
s
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