LTC1751 查看數據表（PDF） - Linear Technology
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LTC1751 Datasheet PDF : 12 Pages
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LTC1751/LTC1751-3.3/LTC1751-5
ABSOLUTE AXI U RATI GS
(Note 1)
VIN to GND .................................................. – 0.3V to 6V
PGOOD, FB, VOUT to GND ........................... – 0.3V to 6V
SS, SHDN to GND ........................ – 0.3V to (VIN + 0.3V)
VOUT Short-Circuit Duration ............................. Indefinite
IOUT (Note 2)....................................................... 125mA
Operating Temperature Range (Note 3) .. – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
FB/PGOOD* 1
VOUT 2
VIN 3
GND 4
8 SS
7 SHDN
6 C+
5 C–
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 160°C/W
*PGOOD ON LTC1751-3.3/LTC1751-5
FB ON LTC1751
ORDER PART
NUMBER
LTC1751EMS8
LTC1751EMS8-3.3
LTC1751EMS8-5
MS8 PART MARKING
LTKL
LTKN
LTKP
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full specified
temperature range, otherwise specifications are at TA = 25°C. CFLY = 1µF, CIN = 10µF, COUT = 10µF unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
LTC1751-3.3
VIN
Input Supply Voltage
VOUT
Output Voltage
ICC
VR
η
LTC1751-5
Operating Supply Current
Output Ripple
Efficiency
2V ≤ VIN ≤ 4.4V, IOUT ≤ 40mA
2.5V ≤ VIN ≤ 4.4V, IOUT ≤ 80mA
2V ≤ VIN ≤ 4.4V, IOUT = 0mA, SHDN = VIN
VIN = 2.5V, IOUT = 40mA
VIN = 2V, IOUT = 40mA
q2
4.4
q 3.17
3.3
3.43
q 3.17
3.3
3.43
q
18
40
68
80
VIN
VOUT
ICC
VR
η
LTC1751
Input Supply Voltage
Output Voltage
Operating Supply Current
Output Ripple
Efficiency
2.7V ≤ VIN ≤ 5.5V, IOUT ≤ 50mA
3V ≤ VIN ≤ 5.5V, IOUT ≤ 100mA
2.7V ≤ VIN ≤ 5.5V, IOUT = 0mA, SHDN = VIN
VIN = 3V, IOUT = 50mA
VIN = 3V, IOUT = 50mA
q 2.7
5.5
q 4.8
5
5.2
q 4.8
5
5.2
q
20
50
75
82
VIN
Input Supply Voltage
q2
5.5
ICC
Operating Supply Current
2V ≤ VIN ≤ 5.5V, IOUT = 0mA, SHDN = VIN (Note 4 ) q
16
40
VFB
FB Regulation Voltage
2V ≤ VIN ≤ 5.5V, IOUT ≤ 20mA
q 1.157 1.205 1.253
IFB
FB Input Current
VFB = 1.3V
q – 50
50
ROUT
Open-Loop Charge Pump Strength VIN = 2V, VOUT = 3.3V (Note 5)
VIN = 2.7V, VOUT = 5V (Note 5)
q
8.5
20
q
6.0
12
UNITS
V
V
V
µA
mVP-P
%
V
V
V
µA
mVP-P
%
V
µA
V
nA
Ω
Ω
2
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