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參數(shù)資料
| 型號： | LTC1779CS6 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.5 A SWITCHING REGULATOR, 550 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | PLASTIC, SOT-23, 6 PIN |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 170K |
| 代理商： | LTC1779CS6 |
2
LTC1779
(Note 1)
Input Supply Voltage (VIN).........................– 0.3V to 10V
SENSE –, SW Voltages .................. – 0.3V to (VIN + 0.3V)
VFB, ITH/RUN Voltages ..............................–0.3V to 2.4V
SW Peak Output Current (< 10
s) .......................... 0.5A
Storage Ambient Temperature Range ... – 65
°C to 150°C
Operating Temperature Range (Note 2) ....... 0
°C to 70°C
Junction Temperature (Note 3) ............................. 150
°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
TJMAX = 150°C, θJA = 230°C/ W
S6 PART MARKING
ORDER PART
NUMBER
LTC1779CS6
LTLP
Consult factory for Industrial and Military grade parts.
The q denotes specifications that apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 4.2V unless otherwise specified. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input DC Supply Current
Typicals at VIN = 4.2V (Note 4)
Normal Operation
2.4V
≤ VIN ≤ 9.8V
110
TBD
A
Shutdown
2.4V
≤ VIN ≤ 9.8V, VITH/RUN = 0V
8
TBD
A
UVLO
VIN < UVLO Threshold
7
TBD
A
Undervoltage Lockout Threshold
VIN Falling
q
TBD
2.0
TBD
V
VIN Rising
TBD
2.1
TBD
V
Shutdown Threshold (at ITH/RUN)
q
TBD
0.35
TBD
V
Start-Up Current Source
VITH/RUN = 0V
TBD
0.5
TBD
A
Regulated Feedback Voltage
(Note 5)
q
TBD
0.800
TBD
V
Output Voltage Line Regulation
2.4V
≤ VIN ≤ 9.8V (Note 5)
0.12
mV/V
Output Voltage Load Regulation
ITH/RUN Sinking 5A (Note 5)
4.2
mV/
A
ITH/RUN Sourcing 5A (Note 5)
4.2
mV/
A
VFB Input Current
(Note 5)
5
TBD
nA
Overvoltage Protect Threshold
Measured at VFB
TBD
0.860
TBD
V
Overvoltage Protect Hysteresis
20
mV
Overtemperature Protect Threshold
170
°C
Overtemperature Protect Hysteresis
15
°C
Oscillator Frequency
VFB = 0.8V
TBD
550
TBD
kHz
VFB = 0V
90
kHz
RDS(ON) of Internal P-Channel FET
VIN = 4.2V, ISW = 100mA
0.6
TBD
Maximum Current Sense Voltage
120
mV
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1779 is guaranteed to meet specified performance over
the 0
°C to 70°C operating temperature range.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD θJ°C/W)
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC1779 is tested in a feedback loop that servos VFB to the
output of the error amplifier.
ITH/RUN 1
GND 2
VFB 3
6 SW
5 VIN
4 SENSE–
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC SOT-23
ABSOLUTE
AXI U
RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
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