参数资料
| 型号： | CMPWR101R |
| 厂商： | ON Semiconductor |
| 文件页数： | 2/7页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .25A SOIC8 |
| 产品变化通告： | Product Discontinuation 30/Sept/2011 |
| 标准包装： | 2,500 |
| 系列： | SmartOR™ |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 5.5V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 250mA（最小值） |
| 电流 - 限制（最小）： | 275mA |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
CMPWR101
TYPICAL APPLICATION CIRCUIT
CMPWR101
V CC
SIMPLIFIED ELECTRICAL SCHEMATIC
V CC
5V
+ C IN
V CC
DRIVE
DRIVE
+
V DESELECT -
ENABLE
DRIVE
V AUX
3.3 V
1 m F
V AUX
V OUT
GND
3.3 V/250 mA
+ C OUT
V OUT
4.1 V
0.2 W
V REF
3.3 V
+
-
4 m F
V AUX
V OUT
GND
GND
PACKAGE / PINOUT DIAGRAM
Top View
V CC
V AUX
V AUX
GND
1
2
3
4
8
7
6
5
DRIVE
V OUT
V OUT
N/C
8 ? Pin SOIC
Table 1. PIN DESCRIPTIONS
Pin(s)
1
2 ? 3
4
5
6 ? 7
8
Name
V CC
V AUX
GND
NC
V OUT
DRIVE
Description
V CC is the power source for the internal regulator and is monitored continuously by an internal controller
circuit. Whenever V CC exceeds V CCSEL (4.25 V typically), the internal regulator will be enabled and deliver
a fixed 3.3 V at V OUT .
When V CC falls below V CCDES (4.10 V typically), the regulator will be disabled. Internal loading on this pin is
typically 0.6 mA when the regulator is enabled, which reduces to 0.1 mA whenever the regulator is disabled. If
V CC falls below the voltage on the V AUX pin, the V CC loading will further reduce to only a few microamperes.
During a V CC power ? up or power ? down sequence, there will be an effective step increase in V CC line current
when the regulator is enabled/disabled. This line current transient will cause a voltage disturbance at the V CC
pin. The magnitude of the disturbance will be directly proportional to the effective power supply source
impedance being delivered to the V CC input.
A built ? in hysteresis voltage of 150 mV has been incorporated to minimize any chatter during supply
changeover. It is recommended that the power supply connected to the V CC input should have a source
resistance of less than 0.25 W to minimize the event of chatter during the enabling/disabling of the regulator.
If the V CC pin is within a few inches of the main input filter, a capacitor may not be necessary. Otherwise an
input filter capacitor in the range of 1 m F to 10 m F will help to lower the effective source impedance.
V AUX is the auxiliary power source. When selected, (V CC < V CCDES ), the auxiliary supply is directly connected
to V OUT , via the low impedance (0.3 W typically) fully integrated switch.
The internal loading on this pin is typically less than 10 m A and will increase to 100 m A if V CC falls below the
voltage on V AUX .
When V AUX = 0 V, the V CCDES voltage is inhibited which prevents the regulator from being disabled.
GND is the negative reference for all voltages. The current that flows in the ground connection is very low
(typically 0.6 mA) and has minimal variation over all load conditions.
NC is an unconnected pin which is electrically isolated from the internal circuitry.
V OUT is the regulator output voltage connection used to power the load. An output capacitor of 4.7 m F is used
to provide the necessary phase compensation, thereby preventing oscillation. The capacitor also helps to
minimize the peak output disturbance during power supply changeover.
DRIVE is a CMOS output logic signal (Active Low) referenced to the V CC supply. This output is taken low
whenever the internal regulator is not enabled. This output is intended only as a control signal for external
circuitry.
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| CMPWR101S | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:250mA SMARTOR Regulator with V switch |
| CMPWR101S/R | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:Analog IC |
| CMPWR101S/T | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:Analog IC |
| CMPWR101SR | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:250mA SMARTOR Regulator with V switch |
| CMPWR101ST | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:250mA SMARTOR Regulator with V switch |
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