參數(shù)資料
型號: LT1766HGN#TR
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 3 A SWITCHING REGULATOR, 228 kHz SWITCHING FREQ-MAX, PDSO16
封裝: 0.150 INCH, PLASTIC, SSOP-16
文件頁數(shù): 25/28頁
文件大?。?/td> 284K
代理商: LT1766HGN#TR
6
LT1766/LT1766-5
1766fb
Switching Frequency
BOOST Pin Current
VC Pin Shutdown Threshold
Minimum Input Voltage with 5V
Output
Switch Voltage Drop
TYPICAL PERFOR A CE CHARACTERISTICS
UW
JUNCTION TEMPERATURE (
°C)
–50
FREQUENCY
(kHz)
50
100
1766 G10
0
25
75
230
220
210
200
190
180
170
–25
150
125
LOAD CURRENT (A)
0
INPUT
VOLTAGE
(V)
1766 G11
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
7.5
7.0
6.5
6.0
5.5
5.0
MINIMUM INPUT
VOLTAGE TO START
MINIMUM INPUT
VOLTAGE TO RUN
TA = 25°C
SWITCH CURRENT (A)
0
0.5
1
1.5
BOOST
PIN
CURRENT
(mA)
1766 G12
45
40
35
30
25
20
15
10
5
0
TA = 25°C
JUNCTION TEMPERATURE (
°C)
–50
1.5
1.7
2.1
25
75
1766 G13
1.3
1.1
–25
0
50
100
150
125
0.9
0.7
1.9
THRESHOLD
VOLTAGE
(V)
SWITCH CURRENT (A)
0
0.5
1
1.5
SWITCH
VOLTAGE
(mV)
1766 G14
450
400
350
300
250
200
150
100
50
0
TJ = 125°C
TJ = 150°C
TJ = 25°C
TJ = –40°C
UU
U
PI FU CTIO S
GND (Pins 1, 8, 9, 16, 17): The GND pin connections act
as the reference for the regulated output, so load regula-
tion will suffer if the “ground” end of the load is not at the
same voltage as the GND pins of the IC. This condition will
occur when load current or other currents flow through
metal paths between the GND pins and the load ground.
Keep the paths between the GND pins and the load ground
short and use a ground plane when possible. The GND pin
also acts as a heat sink and should be soldered to a large
copper plane to reduce thermal resistance. For the FE
package, the exposed pad should be soldered to the
copper ground plane underneath the device. (See Applica-
tions Information—Layout Considerations.)
SW (Pin 2): The switch pin is the emitter of the on-chip
power NPN switch. This pin is driven up to the input pin
voltage during switch on time. Inductor current drives the
switch pin negative during switch off time. Negative volt-
age is clamped with the external catch diode. Maximum
negative switch voltage allowed is – 0.8V.
NC (Pins 3, 5, 7, 13): No Connection.
Switch Minimum ON Time
vs Temperature
JUNCTION TEMPERATURE (
°C)
–50
SWITCH
MINIMUM
ON
TIME
(ns)
400
500
600
25
75
1766 G15
300
200
–25
0
50
100
150
125
100
0
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