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参数资料
| 型号： | DC1227A |
| 厂商： | Linear Technology |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR LTC3534 |
| 设计资源： | DC1227A Design Files DC1227A Schematic |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升/步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 5V |
| 电流 - 输出： | 500mA（最小值） |
| 输入电压： | 3.6 ~ 7 V |
| 稳压器拓扑结构： | 降压-升压 |
| 频率 - 开关： | 1MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTC3534 |
LTC3534
TYPICAL APPLICATIONS
USB to 5V at 500mA
L1
5μH
USB to 5V Efficiency vs I LOAD
330pF R Z
USB
4.35V TO 5.25V
R SS C IN
200k 10μF
C SS
0.056μF
*BURST PWM
L1: COILCRAFT MSS7341
SW1 SW2
PV IN V OUT
V IN
LTC3534
RUN/SS FB
V C
PWM
PGND1 GND PGND2
R FF
10k
C Z1
33pF
C P1
15k
C P2
10pF
C OUT
22μF
3534 TA03a
V OUT
5V
500mA**
R1
649k
R2
162k
100
Burst
90 Mode
OPERATION
80
70
60
50
40
30
20
10
0.01 0.1 1 10
LOAD CURRENT (mA)
V IN = 4.35V
V IN = 4.8V
V IN = 5.25V
100 1000
3534 TA03b
*PWM MUST BE DRIVEN HIGH DURING START-UP. WHEN V OUT IS IN REGULATION,
THE PWM PIN MAY BE DRIVEN LOW TO COMMAND BURST MODE OPERATION.
**NOTE: OUTPUT CURRENT CAN BE LESS THAN 500mA
IF USB INPUT CURRENT LIMIT REACHED.
Li-Ion to 3.3V at 400mA
L1
3.3μH
Li-Ion to 3.3V Efficiency vs I LOAD
+
470pF R Z
V IN
2.7V TO 4.2V
1 Li-Ion
CELL
L1: TDK RLF7030
R SS
200k
C SS
0.056μF
*BURST PWM
C IN
10μF
SW1 SW2
PV IN V OUT
V IN
LTC3534
RUN/SS FB
V C
PWM
PGND1 GND PGND2
R FF
10k
C Z1
66pF
C P1
15k
C P2
10pF
C OUT
22μF
3534 TA04a
V OUT
3.3V
400mA
R1
374k
R2
162k
100
Burst
90 Mode
OPERATION
80
70
60
50
40
30
20
10
0.01 0.1 1 10
LOAD CURRENT (mA)
V IN = 2.7V
V IN = 3.6V
V IN = 4.2V
100 1000
3534 TA04b
*PWM MUST BE DRIVEN HIGH DURING START-UP. WHEN V OUT IS IN REGULATION,
THE PWM PIN MAY BE DRIVEN LOW TO COMMAND BURST MODE OPERATION.
3534fb
16
For more information www.linear.com/LTC3534
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