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LTC1265-5 数据表(PDF) 2 Page - Linear Technology

部件名 LTC1265-5
功能描述  1.2A, High Efficiency Step-Down DC/DC Converter
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1265-5 数据表(HTML) 2 Page - Linear Technology

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LTC1265/LTC1265-3.3/LTC1265-5
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = 0V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IFB
Feedback Current into Pin 9
LTC1265
0.2
1
µA
VFB
Feedback Voltage
LTC1265C
q
1.22
1.25
1.28
V
VIN = 9V, LTC1265I
q
1.20
1.25
1.30
V
VOUT
Regulator Output Voltage
LTC1265-3.3: ILOAD = 800mA
q
3.22
3.3
3.40
V
LTC1265-5: ILOAD = 800mA
q
4.9
5
5.2
V
∆VOUT
Output Voltage Line Regulation
VIN = 6.5V to 10V, ILOAD = 800mA
–40
0
40
mV
Output Voltage Load Regulation
LTC1265-3.3: 10mA < ILOAD < 800mA
40
65
mV
LTC1265-5: 10mA < ILOAD < 800mA
60
100
mV
Burst Mode Operation Output Ripple
ILOAD = 0mA
50
mVP-P
IQ
Input DC Supply Current (Note 3)
Active Mode: 3.5V < VIN < 10V
1.8
2.4
mA
Sleep Mode: 3.5V < VIN < 10V
160
230
µA
Sleep Mode: 5V < VIN < 10V (LTC1265-5)
160
230
µA
Shutdown: VSHDN = VIN, 3.5V < VIN < 10V
5
15
µA
VLBTRIP
Low-Battery Trip Point
1.15
1.25
1.35
V
ILBIN
Current into Pin 4
0.5
µA
ILBOUT
Current Sunk by Pin 3
VLBOUT = 0.4V, VLBIN = 0V
0.5
1.0
1.5
mA
VLBOUT = 5V, VLBIN = 10V
1.0
µA
V8 – V7
Current Sense Threshold Voltage
LTC1265: VSENSE
– = 5V, V9 = VOUT/4 + 25mV (Forced)
25
mV
VSENSE– = 5V, V9 = VOUT/4 – 25mV (Forced)
130
150
180
mV
LTC1265-3.3: VSENSE– = VOUT + 100mV (Forced)
25
mV
VSENSE
– = VOUT – 100mV (Forced)
130
150
180
mV
LTC1265-5: VSENSE– = VOUT + 100mV (Forced)
25
mV
VSENSE– = VOUT – 100mV (Forced)
130
150
180
mV
RON
ON Resistance of Switch
LTC1265C
q
0.3
0.60
Ω
LTC1265I
0.3
0.70
Ω
I5
CT Pin Discharge Current
VOUT in Regulation, VSENSE– = VOUT
40
60
100
µA
VOUT = 0V
2
10
µA
tOFF
Switch Off Time (Note 4)
CT = 390pF, ILOAD = 800mA (LTC1265C)
q
456
µs
CT = 390pF, ILOAD = 800mA (LTC1265I)
q
3.5
5
7
µs
Input Supply Voltage (Pins 1, 2, 13) ..........– 0.3V to 13V
DC Switch Current (Pin 14) .................................... 1.2A
Peak Switch Current (Pin 14) ................................. 1.6A
Switch Voltage (Pin 14) .................................. VIN – 13.0
Operating Temperature Range
LTC1265C ............................................... 0
° to 70°C
LTC1265I ........................................ – 40
°C to 85°C
Junction Temperature (Note 2) ............................. 125
°C
Storage Temperature Range ....................– 65
° to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
(Voltages Refer to GND Pin) (Note 1)
ORDER PART
NUMBER
LTC1265CS
LTC1265CS-5
LTC1265CS-3.3
LTC1265IS
Consult factory for Military grade parts.
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
*ADJUSTABLE OUTPUT VERSION
TJMAX = 125°C, θJA = 110°C/W
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PWR VIN
VIN
LBOUT
LBIN
CT
ITH
SENSE–
SW
PWR VIN
PGND
SGND
SHDN
N/C (VFB*)
SENSE+
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ELECTRICAL CHARACTERISTICS



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