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参数资料
| 型号： | ISL6420BIRZ-TK |
| 厂商： | Intersil |
| 文件页数： | 11/21页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 20-QFN |
| 标准包装： | 1,000 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.4MHz |
| 占空比： | 100% |
| 电源电压： | 4.5 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
ISL6420B
Typical Performance Curves
98
96
94
92
90
88
86
84
82
(Continued)
V IN = 12V
V IN = 5V
80
0
1
2
3
4 5 6
7
8
9
10
LOAD (A)
FIGURE 7. EFFICIENCY vs LOAD CURRENT (V OUT = 3.3V)
Pin Descriptions
VIN
This pin powers the controller and must be decoupled
to ground using a ceramic capacitor as close as
possible to the VIN pin.
TABLE 1. INPUT SUPPLY CONFIGURATION
1400
1300
1200
1100
1000
900
800
700
INPUT
PIN CONFIGURATION
600
500
5.5V to Connect the input to the VIN pin. The VCC5 pin
28V will provide a 5V output from the internal LDO.
Connect PVCC to VCC5.
5V ±10% Connect the input to the VCC5 pin. Connect the
PVCC and VIN pins to VCC5.
400
300
200
100
0
0
25
50
75
RT (k Ω )
100
125
150
SGND
This pin provides the signal ground for the IC. Tie this
pin to the ground plane through the lowest impedance
connection.
LGATE
This pin provides the PWM-controlled gate drive for
the lower MOSFET.
PHASE
This pin is the junction point of the output filter
inductor, the upper MOSFET source and the lower
MOSFET drain. This pin is used to monitor the voltage
drop across the upper MOSFET for overcurrent
protection. This pin also provides a return path for the
upper gate drive.
UGATE
This pin provides the PWM-controlled gate drive for
the upper MOSFET.
BOOT
This pin powers the upper MOSFET driver. Connect this
pin to the junction of the bootstrap capacitor and the
cathode of the bootstrap diode. The anode of the
bootstrap diode is connected to the PVCC pin.
11
FIGURE 8. OSCILLATOR FREQUENCY vs RT
FB
This pin is connected to the feedback resistor divider
and provides the voltage feedback signal for the
controller. This pin sets the output voltage of the
converter.
COMP
This pin is the error amplifier output pin. It is used as
the compensation point for the PWM error amplifier.
PGOOD
This pin provides a power good status. It is an open
collector output used to indicate the status of the
output voltage.
RT
This is the oscillator frequency selection pin.
Connecting this pin directly to VCC5 will select the
oscillator free running frequency of 300kHz. By placing
a resistor from this pin to GND, the oscillator frequency
can be programmed from 100kHz to 1.4MHz. Figure 8
shows the oscillator frequency vs. the RT resistance.
FN6901.1
December 4, 2009
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| ISL6420BMAEP-TK | 制造商:Intersil Corporation 功能描述:VOLT MODE PWM CNTRLR 20QSOP W - Tape and Reel |
| ISL6420EVAL3 | 功能描述:EVALUATION BOARD 3 ISL6420 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| ISL6420IA | 功能描述:IC REG CTRLR BUCK PWM VM 20-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| ISL6420IA-TK | 功能描述:IC REG CTRLR BUCK PWM VM 20-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
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