参数资料
| 型号： | ISL9106IRZ |
| 厂商： | Intersil |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.2A 10DFN |
| 标准包装： | 100 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 5.5 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.6MHz |
| 电流 - 输出： | 1.2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
ISL9106
Block Diagram
MODE
SOFT-
SHUTDOWN
START
SHUTDOWN
EN
BANDGAP
0.8V
EAMP
+
OSCILLATOR
VIN
COMP
PWM/PFM
LOGIC
CONTROLLER
PROTECTION
SW
SLOPE
COMP
+
DRIVER
PGND
RSI
VREF5
+
SCP
FB
+
CSA
VREF3
+
+
+
OCP
VREF1
SGND
VREF4
+
SKIP
VREF2
PG
PGOOD
DELAY
ZERO-CROSS
SENSING
FIGURE 24. FUNCTIONAL BLOCK DIAGRAM
Theory of Operation
The ISL9106 is a step-down switching regulator optimized
for battery-powered handheld applications. The regulator
operates at typical 1.6MHz fixed switching frequency under
heavy load condition to allow small external inductor and
capacitors to be used for minimal printed-circuit board (PCB)
area. At light load, the regulator can be selected to enter skip
mode to reduce the switching frequency, unless forced to the
fixed frequency, to minimize the switching loss and to
maximize the battery life. The quiescent current under skip
mode with no loading is typically only 17 μ A. The supply
current is typically only 0.1 μ A when the regulator is disabled.
PWM Control Scheme
The ISL9106 uses the peak-current-mode pulse-width
modulation (PWM) control scheme for fast transient
response and pulse-by-pulse current limiting. Figure 24
shows the circuit functional block diagram. The current loop
consists of the oscillator, the PWM comparator COMP,
9
current sensing circuit, and the slope compensation for the
current loop stability. The current sensing circuit consists of
the resistance of the P-Channel MOSFET when it is turned
on and the Current Sense Amplifier (CSA). The control
reference for the current loops comes from the Error
Amplifier (EAMP) of the voltage loop.
The PWM operation is initialized by the clock from the
oscillator. The P-Channel MOSFET is turned on at the
beginning of a PWM cycle and the current in the P-Channel
MOSFET starts ramping up. When the sum of the CSA
output and the compensation slope reaches the control
reference of the current loop, the PWM comparator COMP
sends a signal to the PWM logic to turn off the P-Channel
MOSFET and to turn on the N-Channel MOSFET. The
N-MOSFET remains on till the end of the PWM cycle. Figure 25
shows the typical operating waveforms during the normal PWM
operation. The dotted lines illustrate the sum of the slope
compensation ramp and the CSA output.
FN6509.0
June 29, 2007
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| ISL9106IRZ-T | 功能描述:IC REG BUCK SYNC ADJ 1.2A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:1,000 系列:- 类型:降压（降压） 输出类型:可调式 输出数:1 输出电压:0.6 V ~ 4.5 V 输入电压:3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:3MHz 电流 - 输出:1.5A 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:6-WDFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:6-LLP-EP（3x3） 产品目录页面:1300 (CN2011-ZH PDF) 其它名称:LM2831ZSDLM2831ZSDTR |
| ISL9106IRZ-TS2708 | 制造商:Intersil Corporation 功能描述:ITSISL9106IRZ-TS2708 INTELION / ATHEROS |
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