参数资料
| 型号： | BD9778HFP-TR |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 3/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A HRP7 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1 V ~ 35 V |
| 输入电压： | 7 V ~ 35 V |
| 频率 - 开关： | 50kHz ~ 500kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-8，D²Pak（7 引线+接片），TO-263CA |
| 包装： | 标准包装 |
| 供应商设备封装： | HRP7 |
| 其它名称： | BD9778HFP-DKR BD9778HFP-DKR-ND BD9778HFPDKR |
BD9778F, BD9778HFP, BD9001F, BD9781HFP
BD9001F (Unless otherwise specified, Ta=-40?C ~ +95?C,V IN =13.2V, V EN =5V)
Technical Note
Parameter
Symbol
Min.
Limits
Typ.
Max.
Unit
Condition
Standby circuit current
I STB
-
4 10
μA
V EN =0V,Ta=25?C
Circuit current
I Q
-
3
4.2
mA
I O =0A
[SW block]
POWER MOS FET ON resistance
Operating output current of overcurrent protection
R ON
I OLIMIT
-
2.5
0.6
4
1.2
-
?
A
I SW =50mA
* Design assurance
[Error Amp block]
Reference voltage 1
Reference voltage 2
Reference voltage input regulation
Input bias current
Maximum FB voltage
Minimum FB voltage
FB sink current
FB source current
Soft start time
V REF1
V REF2
?V REF
I B
V FBH
V FBL
I FBSINK
I FBSOURCE
Tss
0.98
0.96
-
-1
2.4
-
-5.0
70
-
1.00
1.00
0.5
-
2.5
0.05
-3.0
120
5
1.02
1.04
-
-
-
0.10
-0.5
170
-
V
V
%
μA
V
V
mA
μA
ms
V FB =V INV ,Ta=25?C
V FB =V INV
V IN =7 ~ 48V
V INV =1.1V
V INV =0.5V
V INV =1.5V
V FB =1.5V,V INV =1.5V
V FB =1.5V,V INV =0.5V
* Design assurance
[Oscillator block]
Oscillation frequency
Frequency input regulation
F OSC
?F OSC
82
-
102
2
122
-
kHz
%
R T =390k?
V IN =7 ~ 48V
[Enable block]
Threshold voltage
V EN
0.8
1.7
2.6
V
Sink current
I EN
-
13
50
μA
V EN =5V
* Not designed to be radiation-resistant.
BD9781HFP (Unless otherwise specified, Ta=-40?C ~ +125?C,V IN =13.2V,V EN/SYNC =5V)
Parameter
Symbol
Min.
Limits
Typ.
Max.
Unit
Condition
Standby circuit current
I STB
-
0 10
μA
V EN/SYNC =0V,Ta=25oC
Circuit current
I Q
-
3
8
mA
I O =0A
[SW block]
POWER MOS FET ON resistance
Operating output current of overcurrent protection
Output leak current
R ON
I OLIMIT
I OLEAK
-
4
-
0.5
8
0
0.9
-
30
?
A
μA
I SW =50mA
* Design assurance
V IN =35V,V EN/SYNC =0V
[Error Amp block]
Reference voltage1
Reference voltage2
Reference voltage input regulation
Input bias current
Maximum FB voltage
Minimum FB voltage
FB sink current
FB source current
Soft start time
V REF1
V REF2
?V REF
I B
V FBH
V FBL
I FBSINK
I FBSOURCE
T SS
0.98
0.97
-
-1
2.4
-
-5.0
70
-
1.00
1.00
0.5
-
2.5
0.05
-3.0
120
5
1.02
1.03
-
-
-
0.10
-0.5
170
-
V
V
%
μA
V
V
mA
μA
mS
V FB =V INV ,Ta=25oC
V FB =V INV
V IN =5 ~ 35V
V INV =1.1V
V INV =0.5V
V INV =1.5V
V FB =1.5V,V INV =1.5V
V FB =1.5V,V INV =0.5V
* Design assurance
[Oscillator block]
Oscillation frequency
Frequency input regulation
F OSC
?F OSC
82
-
102
1
122
-
kHz
%
R T =390k?
V IN =5 ~ 35V
[Enable/Synchronizing input block]
Threshold voltage
V EN/SYNC
0.8
1.7
2.6
V
Sink current
External synchronizing frequency
I EN/SYNC
F SYNC
-
-
35
150
90
-
μA
kHz
V EN/SYNC =5V
F EN/SYNC =150kHz
* Not designed to be radiation-resistant.
www.rohm.com
? 2010 ROHM Co., Ltd. All rights reserved.
3/16
2010.02 - Rev. B
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