参数资料
型号: LTC3704EMS#TR
厂商: Linear Technology
文件页数: 21/28页
文件大小: 0K
描述: IC REG CTRLR INV PWM CM 10-MSOP
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
占空比: 97%
电源电压: 2.5 V ~ 36 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
其它名称: LTC3704EMSTR
LTC3704
APPLICATIO S I FOR ATIO
P D = I O(MAX) ? V F
Assuming a maximum junction temperature of 125 ° C and
7. The DC coupling capacitor must be capable of handling
an RMS current of:
a forward voltage of approximately 0.33V at 3A (the
maximum output current at V IN = 15V), this diode will
dissipate 1W at full load. The diode selected was the
I D ( PEAK ) = – I O ( MAX ) ?
D MAX
1 – D MAX
= 3 A
MBRD835L from On Semiconductor, packaged in a
D-Pak.
C1
V IN
5V to 15V
V OUT
–5.0V
1nF
R2
68.1k 1%
R1
154k
1%
1
2
RUN
I TH
SENSE
V IN
10
9
L1*
?
?
L2*
2A to 3A
(5A PEAK)
R C
3k
C C1
4.7nF
3
4
5
LTC3704
NFB INTV CC
FREQ GATE
MODE/SYNC GND
8
7
6
M1
C DC
47 μ F
X5R
D1
C OUT
100 μ F
X5R
(X2)
D2
R T
80.6k
1%
C VCC
4.7 μ F
X5R
C IN
47 μ F
X5R
GND
Q1
R SS1
750 Ω
R FB1
1.21k
1%
R FB2
3.65k
1%
C IN : TDK C5750X5R1C476M
C DC : TDK C5750X7R1C476M
3704 F15
D1: ON SEMICONDUCTOR MBRD835L
D2: CDMSH-3
R SS2
100 Ω
C SS
10nF
C OUT : TDK C5750X5R0J107M
C VCC : TAIYO YUDEN LMK316BJ475ML
L1, L2: BH ELECTRONICS BH510-1009
M1: SILICONICS/VISHAY Si4884
Q1: MMBT3904
Figure 15. 5V to 15V Input, –5V Output at 2A-3A(5A Peak)
Positive-to-Negative Converter with Soft-Start and Undervoltage Lockout.
100
6
90
80
70
V IN = 5V
V IN = 15V
V IN = 10V
5
4
60
50
40
FET = Si4884
3
2
30
L = BH510-1009
V O = –5V
FREQ = 300kHz
1
20
0.001
0.01
0.1
1
10
0
5
10
15
OUTPUT CURRENT (A)
3704 F16
Figure 16. Efficiency vs Output Current
INPUT VOLTAGE (V)
3704 F17
Figure 17. Maximum Output Current vs Input Voltage
3704fb
21
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