參數(shù)資料
型號(hào)： LTC3675EUFF#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： POWER SUPPLY SUPPORT CKT, PQCC44
封裝： 4 X 7 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-44
文件頁數(shù)： 31/36頁
文件大?。?/td> 413K
代理商： LTC3675EUFF#TRPBF
LTC3675
4
3675f
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
junction temperature range, otherwise specications are at TA = 25°C. VIN = 3.6V.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
Input Supply Range
l
2.7
5.5
V
VIN_FALLING
Falling Undervoltage Threshold
l
2.35
2.45
2.55
V
VIN_RISING
Rising Undervoltage Threshold
l
2.45
2.55
2.65
V
VIN_WARN
Falling Undervoltage Warning Threshold
UV[2], UV[1], UV[0] = 000
2.7
V
UV[2], UV[1], UV[0] = 001
2.8
V
UV[2], UV[1], UV[0] = 010
2.9
V
UV[2], UV[1], UV[0] = 011
3.0
V
UV[2], UV[1], UV[0] = 100
3.1
V
UV[2], UV[1], UV[0] = 101
3.2
V
UV[2], UV[1], UV[0] = 110
3.3
V
UV[2], UV[1], UV[0] = 111
3.4
V
VIN_HYS
VIN Undervoltage Warning Hysteresis
50
mV
VIN_WARN(LSB)
Undervoltage Warning Threshold Step Size
l
85
100
115
mV
OT
Overtemperature Shutdown
150
°C
OT_WARN
Overtemperature Warning Threshold; Die
Temperature Below OT that Causes IRQB = 0
OT[1], OT[0] = 00
OT[1], OT[0] = 01
OT[1], OT[0] = 10
OT[1], OT[0] = 11
10
20
30
40
°C
IVIN_ALLOFF
Input Supply Current
All Switching Regulators and LED Driver
in Shutdown, ONB = HIGH; Sum of All VIN
Currents
16
28
μA
fOSC
Voltage Regulator Switching Frequency
All Voltage Regulators
l
1.8
2.25
2.7
MHz
VPGOOD(RISE)
Rising PGOOD Threshold Voltage
Full-Scale (1,1,1,1) Reference Voltage
93.5
%
VPGOOD(HYS)
PGOOD Hysteresis
All Regulators Except LED Driver
1
%
1A Buck Regulator (Buck Regulators 1 and 2)
IVIN1,2
Pulse-Skipping Input Current
Burst Mode
Operation Input Current
VFB1 = VFB2 = 0.85V (Notes 4, 5)
105
20
200
50
μA
IFWD1,2
PMOS Current Limit
(Note 6)
2.25
2.8
3.35
A
VFB1,2(HIGH)
Feedback Regulation Voltage
Pulse-Skipping Mode Full-Scale (1,1,1,1)
l
780
800
820
mV
VFB1,2(LOW)
Feedback Regulation Voltage
Pulse-Skipping Mode Full-Scale (0,0,0,0)
l
405
425
445
mV
VLSB1,2
FB1, FB2 Regulation Voltage Step Size
25
mV
IFB12
Feedback Leakage Current
VFB1= VFB2 = 0.85V
–50
50
nA
DMAX1,2
Maximum Duty Cycle
VFB1= VFB2 = 0V
l
100
%
RPMOS1,2
PMOS On-Resistance
ISW1 = ISW2 = 100mA
265
mΩ
RNMOS1,2
NMOS On-Resistance
ISW1 = ISW2 = –100mA
280
mΩ
ILEAKP1,2
PMOS Leakage Current
EN1 = EN2 = 0
–2
2
μA
ILEAKN1,2
NMOS Leakage Current
EN1 = EN2 = 0
–2
2
μA
RSWPD1,2
Output Pull-Down Resistance in Shutdown
EN1 = EN2 = 0 (I2C Bit Set)
10
kΩ
tSS1,2
Soft-Start Time
500
μs
500mA Buck Regulator (Buck Regulators 3 and 4)
IVIN3,4
Pulse-Skipping Input Current
Burst Mode Operation Input Current
VFB3 = VFB4 = 0.85V (Notes 4, 5)
105
20
200
50
μA
IFWD3,4
PMOS Current Limit
(Note 6)
0.75
1.2
1.65
A
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