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参数资料
| 型号： | LT3464ETS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 115MA TSOT23-8 |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 34 V |
| 输入电压： | 2.3 V ~ 10 V |
| PWM 型： | Burst Mode? |
| 电流 - 输出： | 115mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 薄型，TSOT-23-8 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-8 |
LT3464
TYPICAL PERFOR A CE CHARACTERISTICS
FB Pin Voltage vs
FB and CTRL Pin
1.50
CTRL Pin Voltage
8
Bias Currents
12
FB Pin Hysteresis
1.25
7
CTRL PIN
10
6
1.00
5
8
0.75
0.50
4
3
FEEDBACK PIN
6
4
2
0.25
1
2
0
0
0.25
0.5 0.75 1.0 1.25 1.5
CONTROL PIN VOLTAGE (V)
1.75
0
–50
–25
0 25 50
TEMPERATURE ( ° C)
75
100
0
–50
–25
0 25 50
TEMPERATURE ( ° C)
75
100
PI FU CTIO S
3464 G17
3464 G18
3464 G19
? R 2 ?
+ 1 ?
V OUT CTRL ?
R 2 = R 1 ? OUT – 1 ?
CTRL(Pin1): INTERNALREFERENCEOVERRIDEPIN.THISALLOWS
THE FB VOLTAGE TO BE EXTERNALLY SET BETWEEN 0V AND 1.25V.
TIE THIS PIN TO ABOVE 1.5V (V IN FOR EXAMPLE) TO USE THE
INTERNAL 1.25V REFERENCE.
= V
? R 1 ?
WHEN V CTRL IS LESS THAN 1.25V (SEE FIGURE 4)
FB (Pin 2): FEEDBACK PIN. THE LT3464 REGULATES ITS FEED-
BACK PIN TO 1.25V IF THE INTERNAL REFERENCE IS USED OR TO
V CTRL IF THE CTRL PIN IS BETWEEN 0V AND 1.25V. CONNECT
THE FEEDBACK RESISTOR DIVIDER TAP TO THIS PIN. SET THE OUTPUT
VOLTAGE BY SELECTING R1 AND R2 (SEE FIGURE 4).
? V ?
? V REF ?
GND (Pin 4): GROUND. TIE THIS PIN DIRECTLY TO THE GROUND
PLANE.
CAP (Pin 5): PNP EMITTER AND SCHOTTKY CATHODE. THIS PIN
CONNECTS TO THE OUTPUT CAPACITOR, AND OPTIONALLY TO THE
EXTERNAL PHASE-LEAD CAPACITOR.
SW (Pin 6): SWITCH PIN AND SCHOTTKY ANODE. THIS IS THE
COLLECTOR OF THE INTERNAL NPN POWER SWITCH. MINIMIZE THE
METAL TRACE AREA CONNECTED TO THE PIN TO MINIMIZE EMI.
V IN (Pin 7): INPUT SUPPLY PIN: BYPASS THIS PIN WITH A
CAPACITOR LOCATED AS CLOSE TO THE DEVICE AS POSSIBLE.
SHDN (Pin 8): SHUTDOWN PIN. THIS PIN IS USED TO PUT THE
DEVICE IN SHUTDOWN MODE. TIE THE PIN LOW TO SHUT DOWN THE
LT3464. TIE HIGH FOR NORMAL OPERATION SEE THE ELECTRICAL
SPECIFICATIONS FOR THE REQUIRED VOLTAGES.
OUT (Pin 3): PNP COLLECTOR. THIS IS THE OUTPUT OF THE
OUTPUT DISCONNECT CIRCUIT. BYPASS THIS PIN WITH AT LEAST A
0.1 μ F CAPACITOR CONNECTED TO THE CAP PIN OR TO GROUND.
3464f
5
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