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参数资料
型号： AS1344-BTDT
厂商： AUSTRIAMICROSYSTEMS AG
元件分类： DC/DC变换器
英文描述： 42V DCDC for OLED; Package Type: TDFN(3x3)-10
封装： TDFN(3x3)-10
文件页数： 16/19页
文件大小： 1807K
代理商： AS1344-BTDT
www.austriamicrosystems.com
Revision 1.05
16 - 19
AS1344
Datasheet - Application Information
Diode Selection
A Schottky diode must be used to carry the output current into the Cout and load during the NMOS switch-off time.
Note:
Do not use ordinary rectifier diodes, since the slow recovery times will compromise efficiency.
The MBR0520 is a good choice because of the very low forward voltage and the extremely fast switching. If the output
voltage exceeds 20V the use of the PMEG4005 or the MBR0540 (40V Schottky diodes) is recommended. These
diodes are designed to handle an average forward current of 500mA. In applications with higher loads, the PMEG4010
or the MBRM140 should be used, due to the rated average forward current of 1A.
Table 8. Recommended Diodes
Part Number
MBR0540
MBR0520
PMEG4005
PMEG4010
Reverse Voltage
40V
20V
40V
40V
Forward Current
0.5A
0.5A
0.5A
1A
Package
SOD123
SOD123
SOD123
SOD123
Manufacturer
MCC
Philips
www.nxp.com
MBRM140
40V
1A
SOD123
ON Semiconductor
www.onsemi.com
Figure 39. Efficiency Comparison of different Diodes;
V
IN
= 3V, V
OUT
= 18V, L
1
= 6.8μH
90
Figure 40. Efficiency Comparison of different Diodes;
V
IN
= 3.6V, V
OUT
= 18V, L
1
= 6.8μH
90
0
10
20
30
40
50
60
70
80
0.1
1
10
100
Output Current (mA)
E
PMEG4010
MBR0540
MBR0520
PMEG4005
0
10
20
30
40
50
60
70
80
0.1
1
10
100
Output Current (mA)
E
PMEG4010
MBR0540
MBR0520
PMEG4005
相关PDF资料
PDF描述
AS1351-T Dual LDO with OTP 1.8 to 3.3V; Package Type: QFN(3x3)-12; Output Range: 2 x 3,3V
AS1352-7BC0-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 1,8V; Output Range: 2,5V; Output Range: 2,9V; Output Range: 3,0V
AS1352-C0CF-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 1,8V; Output Range: 2 x 3,0V; Output Range: 3,3V
AS1352-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 4 x 3,3V
AS1352V-T Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(3x3)-16; Output Range: 4 x 3,3V
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