参数资料
| 型号： | ISL8107IRZ |
| 厂商： | Intersil |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 16-QFN |
| 标准包装： | 60 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 600kHz |
| 电源电压： | 9 V ~ 75 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： | 16-VQFN 裸露焊盘 |
| 包装： | 管件 |
ISL8107
Typical Performance Curves (Continued)
100
95
90
V IN = 12V
V IN = 24V
100
95
90
V IN = 24V
V IN = 18V
85
80
75
V IN = 48V
V IN = 36V
V IN = 60V
85
80
75
V IN = 36V
V IN = 48V
V IN = 60V
70
65
70
65
60
1
2
3
4
5
6
7
8
60
1
2
3
4
5
6
7
8
OUTPUT CURRENT (A)
FIGURE 7. EFFICIENCY VS LOAD (OUTPUT VOLTAGE = 5V,
F SW = 200kHz (SEE APPLICATION NOTE FOR
MORE DETAILS)
Functional Description
OUTPUT CURRENT (A)
FIGURE 8. EFFICIENCY VS LOAD (OUTPUT VOLTAGE = 12V,
F SW = 200kHz (SEE APPLICATION NOTE FOR
MORE DETAILS)
The delay from POR (T 0 ) to the time the IC starts switching
T delay , switching = 3.712 × 10 ? C SS
Enable/Soft-Start
(T 2 ) can be approximated by using Equation 1:
5
(EQ. 1)
5V
4V
V OUT
ENSS
The output voltage soft-start time is determined by the rise
time of ENSS voltage from 1.4V to 2.6V (T 3 -T 2 ). The output
voltage ramp time can be calculated from:
T SS = ---------------------- ? C SS
33 × 10
3V
1.2
– 6
(EQ. 2)
2V
1.4V
2.6V
The soft-start capacitor C SS is continuously charged up
linearly and clamped at 5V. Note that any leakage current on
ENSS node will extend the start-up period.
1V
POR
0.7V
/C
R TC T
T 0
T 1 T 2
T 3
FIGURE 9. TYPICAL SOFT-START DIAGRAM
ENSS
Figure 9 illustrates the start-up scheme of the ISL8107. The
Power-On Reset (POR) function continually monitors the
bias voltage at VCC and VFF. When the voltage at VCC and
VFF exceed their rising POR thresholds (T 0 ), the ISL8107
provides initially 2μA to charge the soft-start capacitor, C SS ,
connected to the ENSS pin. If the voltage at this pin is
allowed to rise, it will ramp-up with at a slope determined by
the 2μA current and the value of the soft-start capacitor.
When the voltage at ENSS reaches 0.77V (Typ) at T 1 , the
oscillator circuit is active, causing the voltage at RT/CT pin to
drop from V IN and generate sawtooth waveform. At the
same time, the soft-start current is increased to 33μA; the
ENSS voltage then ramps up at a faster rate. The UGATE
starts switching when the ENSS voltage reaches 1.4V (Typ).
9
VOUT
PHAS E
FIGURE 10. TYPICAL SOFT-START WAVEFORM
Oscillator and Synchronization
The ISL8107 provides adjustable frequency from 100kHz to
600kHz by changing external resistor R T and capacitor C T .
FN6605.0
October 29, 2008
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| ISL8107IRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 16-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL8112 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High Light-Load Efficiency, Dual-Output, Main Power Supply Controllers |
| ISL8112EVAL1Z | 功能描述:EVALUATION BOARD FOR ISL8112 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8112IRZ | 功能描述:IC REG DL BCK/LINEAR SYNC 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
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