参数资料
型号: LT3462AES6#TRM
厂商: Linear Technology
文件页数: 3/8页
文件大小: 0K
描述: IC REG INV ADJ 0.25A TSOT23-6
标准包装: 500
类型: 反相
输出类型: 可调式
输出数: 1
输出电压: 可调至 -38V
输入电压: 2.5 V ~ 16 V
PWM 型: 电流模式
频率 - 开关: 2.7MHz
电流 - 输出: 250mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SOT-23-6 细型,TSOT-23-6
包装: 带卷 (TR)
供应商设备封装: TSOT-23-6
其它名称: LT3462AES6
LT3462AES6-ND
Q1984018
LT3462/LT3462A
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency (LT3462)
Current Limit
SDREF Minus FB Pin Voltage
1.6
1.5
480
T A = 25 ° C
LT3462
1.29
1.28
360
1.4
1.3
1.2
1.1
240
120
LT3462A
1.27
1.26
1.25
1.24
1.0
–40 –20
0
20
40
60
80
100
0
10
20
30
40
50
60
70
80
90
1.23
–40 –20
0
20
40
60
80
100
TEMPERATURE ( ° C)
3462 G01
Oscillator Frequency (LT3462A)
DUTY CYCLE (%)
FB Bias Current
3462 G02
TEMPERATURE ( ° C)
Quiescent Current in
Shutdown Mode
3462 G03
3.2
3.0
T A = 25 ° C
0
–5
–10
10
8
T A = 25 ° C
FB = N/C
2.8
–15
–20
6
2.6
–25
–30
4
2.4
–35
2.2
–40
–45
2
2.0
–40 –20
0
20
40
60
80
100
–50
–40
–20
0
20
40 60
80
100
0
0
4
8
12
16
TEMPERATURE ( ° C)
PI FU CTIO S
3462 G04
TEMPERATURE ( ° C)
3462 G05
SUPPLY VOLTAGE (V)
3462 G06
SW (Pin 1): Switch Pin. Connect to external inductor L1
and positive terminal of transfer cap.
GND (Pin 2): Ground. Tie directly to local ground plane.
FB (Pin 3): Feedback Pin. Connect resistive divider tap
here. Set R1 according to R1 = R2 ? (V OUT /1.265V). In
shutdown, a proprietary shutdown bias current cancella-
tion circuit allows the internal 3 μ A source to pull up the
SDREF pin, even with residual negative voltage on V OUT .
SDREF (Pin 4): Dual Function Shutdown and 1.265V
Reference Output Pin. Pull to GND with external N-FET to
turn regulator off. Turn-off pull-down and a 2 μ A internal
source will pull SDREF up to turn-on the regulator. At turn-
on, a 180 μ A internal source pulls the pin to the regulation
voltage. The SDREF pin can supply up to 80 μ A at 1.265V
to bias the feedback resistor divider. An optional soft-start
circuit capacitor connects from this pin to –V OUT .
D (Pin 5): Anode Terminal of Integrated Schottky Diode.
Connect to negative terminal of transfer cap and external
inductor L2.
V IN (Pin 6): Input Supply Pin. Must be locally bypassed.
3462af
3
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