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AIC1569A 参数 Datasheet PDF下载

AIC1569A图片预览
型号: AIC1569A
PDF下载: 下载PDF文件 查看货源
内容描述: 5位DAC ,同步PWM功率调节器 [5-bit DAC, Synchronous PWM Power Regulator]
分类和应用: 调节器
文件页数/大小: 7 页 / 240 K
品牌: AIC [ ANALOG INTERGRATIONS CORPORATION ]
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AIC1569A  
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2.2V  
2.1V  
PIN 4: VID0  
PIN 5: VID1  
PIN 6: VID2  
PIN 7: VID3  
PIN 8: VID4  
2.0V  
2.05V  
2.00V  
1.95V  
1.90V  
1.85V  
1.80V  
1.75V  
1.70V  
1.65V  
1.60V  
1.55V  
1.50V  
1.45V  
1.40V  
1.35V  
1.30V  
- 5-bit DAC voltage select pin. TTL  
inputs used to set the internal  
voltage reference VDAC. When  
left open, these pins are  
internally pulled up to 5V and  
provide logic ones. The level of  
VDAC sets the converter output  
voltage as well as the PGOOD  
and OVP thresholds.  
Table 1 specifies the VDAC  
voltage for the 32 combinations  
of DAC inputs.  
PIN 9:COMP - External compensation pin. This  
pin is connected to error  
amplifier output and PWM  
comparator. An RC network is  
connected to FB pin to  
compensate the voltage-control  
feedback loop of the converter.  
PIN 13:PHASE - Over current detection pin. Connect  
the PHASE pin to source of the  
external MOSFET. This pin detects  
the voltage drop across the MOSFET  
RDS(ON) for over-current protection.  
PIN 10:FB  
- The error amplifier inverting  
input pin. The FB pin and COMP  
pin are used to compensate the  
voltage-control feedback loop.  
PIN 14: UGATE- External MOSFET gate drive pin.  
Connect UGATE to gate of the  
external MOSFET.  
PIN 11:GND  
- Signal GND. It also serves as  
the power GND for the upper  
gate driver.  
PIN 15: BOOT - External MOSFET driver power  
supply pin. To convert 5V main power  
PIN 12:PGOOD- Power good indicator pin.  
PGOOD is an open drain output.  
This pin is pulled low when the  
converter output is 10% out of  
the VDAC reference voltage.  
to VCORE power by driving N-channel  
MOSFET,  
supply voltage of no  
higher than 12V is recommended  
since the negative power terminal of  
the internal driver is internally tied to  
GND.  
Table 1. Output Voltage Program  
VID4 VID3 VID2 VID1 VID0 VDAC  
PIN 16:PGND - Driver power GND pin. PGND should  
be connected to a low impedance  
ground plane close to lower N-  
MOSFET source.  
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3.5V  
3.4V  
3.3V  
3.2V  
3.1V  
3.0V  
2.9V  
2.8V  
2.7V  
2.6V  
2.5V  
2.4V  
2.3V  
PIN 17:LGATE - Lower N-MOSFET gate driver pin.  
PIN 18: VCC - The chip power supply pin. It also  
serves as power supply for LGATE  
driver. Recommended supply voltage  
is 12V.  
PIN 19:OVP  
-Over voltage indicator pin. This pin  
also provides a driver source current  
to turn on an external SCR in the  
event of an over voltage condition.  
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