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參數(shù)資料
| 型號： | RT8805C |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | Two Phase General Purpose PWM Controller |
| 中文描述： | 兩相通用PWM控制器 |
| 文件頁數(shù)： | 5/18頁 |
| 文件大小： | 391K |
| 代理商： | RT8805C |
RT8805C
Preliminary
5
DS8805C-03 August 2007
www.richtek.com
Pin No.
VQFN-16L 3x3
VQFN-24L 4x4
Pin Name
Pin Function
16
1
PHASE1
12
19
PHASE2
These pins are return nodes of the high-side driver. Connect
These pins to high-side MOSFET sources together with the
low-side MOSFET drains and the inductors.
1
2
UGATE1
11
18
UGATE2
Upper Gate Drive. These pins drive the gates of the high
side MOSFETs.
2
3
BOOT1
10
17
BOOT2
Bootstrap Power Pin. These pins power the high-side
MOSFET drivers. Connect These pins to the junctions of the
bootstrap capacitors.
3
4
AGND
Chip Analog Ground.
4
5
IMAX
Maximum Current Setting. This pin sets the current limiting
level. Connect this pin with resistor to ground to set the
current limit.
--
6, 8, 9, 10, 24
NC
No Internal Connection.
5
7
RT
Timing Resistor. Connect a resistor from RT to AGND to set
the clock frequency.
The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
Soft-Start Pin. This pin provides soft-start function for
controller. The COMP voltage of the converter follows the
ramping voltage on the SS pin.
Compensation Pin. This pin is output node of the error
amplifier.
Feedback Pin. This pin is negative input pin of the error
amplifier.
Power Good. PGOOD is an open drain output used to
indicate the status of the voltages on SS pin and FB pin.
PGOOD will go high impedance when SS > 3.7V and FB >
0.6V.
Exposed Pad (17)
11,
Exposed Pad (25) GND
6
12
SS
7
13
COMP
8
14
FB
9
16
PGOOD
15
23
LGATE1
13
20
LGATE2
Lower Gate Drive. These pins drive the gate of the lowside
MOSFETs.
14
21, 22
VCC
The VCC pin is the external 12V power. Internal 5V power
(V
DD
) is regulated from this pin. This pin also powers the low
side MOSFET drivers.
External reference voltage pin. This pin sets the voltage of
FB pin when close loop.
--
15
PI
Functional Pin Description
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相關(guān)代理商/技術(shù)參數(shù) |
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| RT8805CGQV | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Two Phase General Purpose PWM Controller |
| RT8805CGQVA | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Two Phase General Purpose PWM Controller |
| RT8805CPQV | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Two Phase General Purpose PWM Controller |
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| RT8805GQV | 功能描述:IC REG CTRLR BUCK PWM VM 16-VQFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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