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参数资料
| 型号： | LTC1626CS#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, PDSO14 |
| 封装： | 0.150 INCH, PLASTIC, SO-14 |
| 文件页数： | 5/12页 |
| 文件大小： | 258K |
| 代理商： | LTC1626CS#TR |
2
LTC1626
ABSOLUTE MAXIMUM RATINGS
W
WW
U
(Voltages Referred to GND Pin)
Input Supply Voltage (Pins 1, 2, 13) ............– 0.3V to 7V
Shutdown Input Voltage (Pin 10) ................– 0.3V to 7V
Sense–, Sense+ (Pins 7, 8)........... – 0.3V to (VIN + 0.3V)
LBO, LBI (Pins 3, 4) .................................... – 0.3V to 7V
CT, ITH, VFB (Pins 5, 6, 9) ............. – 0.3V to (VIN + 0.3V)
DC Switch Current (Pin 14) .................................... 1.2A
Peak Switch Current (Pin 14) ................................. 1.6A
Switch Voltage (Pin 14) ....... (VIN – 7.5V) to (VIN + 0.3V)
Operating Temperature Range ..................... 0
°C to 70°C
Extended Commercial Operating
Temperature Range (Note 4) ............. – 40
°C to 85°C
Junction Temperature (Note 1) ............................. 125
°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
PACKAGE/ORDER INFORMATION
W
U
Consult factory for Industrial and Military grade parts.
ORDER PART
NUMBER
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PWR VIN
VIN
LBO
LBI
CT
ITH
SENSE–
SW
PWR VIN
PGND
SGND
SHDN
VFB
SENSE+
LTC1626CS
TJMAX = 125°C, θJA = 110°C/ W
ELECTRICAL CHARACTERISTICS T
A = 25°C, VIN = 4.5V, VOUT = 2.5V, VSHDN = 0V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IFB
Feedback Pin Current
0.1
1
A
VFB
Feedback Voltage
0
°C to 70°C
q
1.22
1.25
1.28
V
–40
°C to 85°C
q
1.2
1.3
V
VOUT
Output Voltage Line Regulation
VIN = 3.5V to 5.5V, ILOAD = 250mA
– 40
0
40
mV
Output Voltage Load Regulation
10mA
≤ ILOAD ≤ 250mA
25
50
mV
Burst Mode Output Ripple
ILOAD = 0
50
mVP-P
IQ
Input DC Supply Current (Note 2)
Active Mode
q
1.9
3.0
mA
Sleep Mode
q
165
300
A
Shutdown
VSHDN = VIN
0.5
5
A
VLBTRIP
Low-Battery Trip Point
1.15
1.25
1.35
V
ILBI
Low-Battery Input Bias Current
±0.5
A
ILBO
Low-Battery Output Sink Current
VLBO = 0.4V
0.4
1.4
mA
VSENSE
Current Sense Threshold Voltage
VSENSE
– = 2.5V, VFB = VOUT/2 + 25mV (Forced)
25
mV
VSENSE+ – VSENSE–
VSENSE– = 2.5V, VFB = VOUT/2 – 25mV (Forced)
130
155
180
mV
RON
ON Resistance of Switch
0.32
0.45
tOFF
Switch Off-Time (Note 3)
CT = 390pF, ILOAD = 400mA
4
5
6
s
VIHSD
SHDN Pin High
Minimum Voltage for Device to Be Shut Down
VIN – 0.4
V
VILSD
SHDN Pin Low
Maximum Voltage for Device to Be Active
0.4
V
IINSD
SHDN Pin Input Current
0V
≤ VSHDN ≤ 7V
q
±1
A
The q denotes specifications that apply over the specified operating
temperature range.
Note 1: TJ is calculated from the ambient temperature TA and power
dissipation according to the following formula:
TJ = TA + (PD 110°C/W)
Note 2: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 3: In applications where RSENSE is placed at ground potential, the
off-time increases by approximately 40%.
Note 4: C grade device specifications are guaranteed over the 0
°C to 70°C
temperature range. In addition, C grade device specifications are assured
over the – 40
°C to 85°C temperature range by design or correlation, but
are not production tested.
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