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Impala Linear Corporation
ILC5140/5141/5142
Advance CMOS Multilevel Voltage Detector
General Description The ILC514X is an innovative, multilevel voltage detector, designed to monitor the terminal voltage of a power source and provide up to four independent flags when the voltage levels drop below designated levels. The ILC514X is unique in its design because one device can now signal the user when a discharging battery goes below four (4) different threshold voltages and because it requires no external precision components to monitor these voltage levels. The open drain flags are asserted when the terminal voltage goes below their designated thresholds and are de-asserted 140ms after the thresholds are exceeded. Additionally, the ILC514X has a manual reset pin that allows the system to assert all flags for a minimum of 200ms. Built using Impala's prorprietary Analog CMOS process, the ILC514X is packaged in a spacesaving MSOP10 package. Quiescent current is below 10A. The threshold values for the reset flags are factory set. Alternate values may be discussed with Impala Product Marketing. Threshold values are accurate to within 1%. The device is available in three output configurations: Open Drain RESET, Push Pull RESET and Push Pull RESET. * * * *
Features Four levels of a single terminal voltage monitored No precision external components < 10A Quiescent current Available in three output configurations ILC5140 Open Drain RESET ILC5141 Push Pull RESET ILC5142 Push Pull RESET Threshold accuracies within 1% Small MSOP10 plastic package Factory preset threshold voltages Manual reset input pin Minimum 140ms delay on reset
* * * * *
Applications * * * * * * * Handheld PC's PDA's Notebook PC's Battery electronics Medical Instrumentation Personal Electronics Personal Communicators
Ordering Information* TA = =40C to +85C ILC514XCS 10-Pin MSOP
Typical Circuit
MR
Rpullup
ILC5140
Measurement And Control Circuits Flag 1 Flag 2 Flag 3 Flag 4
+
Battery
Impala Linear Corporation
ILC514x 1.1
-
(408) 574-3939
www.impalalinear.com
Dec 2000
1
CMOS Multilevel Voltage Detector
Advance
Pin-Package Configurations
To Be Assigned
Pin Number TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD
Name VIN GND CP+ CPCPVSS MR F1 F2 F3 F4
Pin Description and Function Voltage input from power source - battery or power supply IC Ground Pin Charge Pump Capacitor + Charge Pump Capacitor Charge Pump VSS Manual Reset Input (Connects to CPVSS pin) Connection for output flags. Flags are asserted in order of decreasing voltage thresholds. F1 is asserted at a higher voltage than F2, F2 is asserted at a higher voltage than F3 and F3 is asserted at a higher voltage than F4. Output flags are: ILC5140 - Open Drain RESET, ILC5141 - Push Pull RESET, ILC5142 Push Pull RESET
Impala Linear Corporation
ILC514x 1.1
(408) 574-3939
www.impalalinear.com
Dec 2000
2
CMOS Multilevel Voltage Detector
Advance
Absolute Maximum Ratings (Note 1)
Parameter Supply Voltage (V+ to GND, or GND to OUT) All Other Inputs Output Current Per Flag Voltage on FLAG pin relative to GND Rate or Rise, VCC Continuous Power Dissipation (T= +85C) Operating Temperature Ranges Maximum Junction Temperature Storage Temperature Range Lead Temperature (soldering, 10sec) Package Thermal Resistance JA PD TA TJ(MAX) Tstg Symbol VCC VIN IOUT VFlg Ratings +6 +6 20 VIN + 0.3V 100 470 -40 to +85 170 -40 to +125 300 TBD Units V V mA V V/s mW C C C C C/W
DC Electrical Characteristics ILC514X
Unless otherwise specified, all limits are at TA = 25C Boldface limits apply over the operating temperature range. Parameter Operating Supply Voltage (RESET in correct state) Reset Threshold Voltage Supply Current MR Input Voltage Output Sink Current Output Voltage Low, RESET Output Voltage High, RESET Reset Threshold Tempco VOL VOH 0.8VCC ICC VCC < 3.6V VCC < 3.6V Symbol VCC Conditions TA = 0C to +85C TA = -40C to +105C Min 1.8 2.0 VTH-1% VTH 10 -VCC 3.2 0.4 Typ Max 5.5 5.5 VTH-1% 30 Units V V V A V mA V 30-50 V ppm/C
AC Electrical Characteristics ILC514X
Parameter MR Minimum Pulse Width VCCDetect to Flag Enable VCC Detect to Flag Enable 120 Symbol Condtions Min Typ 20 20 240 Max Units s s ms
Impala Linear Corporation
ILC514x 1.1
(408) 574-3939
www.impalalinear.com
Dec 2000
3
CMOS Multilevel Voltage Detector
Advance
VTH1 Voltage VCC Voltage VCC VTH2 VTH3 VTH4
VTH1 VTH2 VTH3 VTH4
Time (ms)
140ms Minimum Delay
Time (ms)
140ms Minimum Delay
Flag 1
Flag 1
Flag 2
Flag 2
Flag 3 Flag 4
Flag 3
Flag 4
Voltage VCC
VTH
Time (ms)
140ms Minimum Delay
Flag Clock
400ms
t
Voltage VCC
VTH
V = 20mV
VTH -20mV
Time VCC
140 ms Minimum Delay
Flag Clock
Impala Linear Corporation
ILC514x 1.1
(408) 574-3939
www.impalalinear.com
Dec 2000
4
CMOS Multilevel Voltage Detector
Advance
Detailed Descripton The ILC514X is designed to monitor the terminal voltage of a power source such as a battery and to assert a flag depending on the internally set threshold voltages. Up to four flags can be used to warn of declining stages of a battery's life. The flags are arranged in order of decreasing threshold values; therefore Flag 1 is asserted at VTH1, Flag 2 is asserted at a voltage VTH2 which is lower than VTH1 and so on. The ILC514C is ideally suited for systems such as PDA's, notebooks and personal electronics where multiple warning and resets are desirable. An example of such a requirement is in a PDA, where Flag 1 is asserted at VTH1 = 2.9V "LOW BATTERY WARNING" flag; Flag 2 is asserted at VTH2 = 2.7V "DISABLE CMOS WRITE"; Flag 3 is asserted at VTH3 = 2.5V "DISABLE IrDA PORT" and Flag 4 is asserted at VTH4 = 2.3V "DISABLE SYSTEM EXCEPT CHARGING." RESET
AND
Threshold Detect to Flag Enable The ILC5140 samples the input voltage once every 400 ms. This sampling rate was chosen to conserve battery life and at the same time keep a reasonble vigil on the terminal voltage level. Once the thrshold has been passed, the flag enable function reacts within 30s. In addition to the 400ms sampling, a sample and hold circuit compares the input voltage to the most recent sample and if there is a DV greater than 20mV the input sampling is turned on continuously until either a flag is asserted or the threshold is regained. If, during the continuous sampling a thrshold is crossed, the flag is enabled. This method inherently prevents accidental tripping of the flag during minor input voltage level glitches. Once the threshold is crossed on an increasing voltage level, the flag is disabled 140ms after such a threshold is detected. This is a minimum time since an addtional 400ms may be added if the threshold is not detected at the beginning of a regular sampling. Voltage Thrsholds for the Flags The flags are labelled Flag 1, Flag 2, Flag 3, Flag 4. Voltage thrsholds are arranged in order of decreasing voltage levels, therefore Flag 1 will have a higher threshold than Flag 2 and so on.
RESET
The ILC514X has three output configurations: Open Drain (ILC5140) RESET, Push Pull (ILC5141) RESET and Push Pull (ILC5142) RESET Voltage Thresholds The ILC5140 series will be offered in a variety of voltage thresholds corresponding to industry standard requirements. In addition, customer defined voltage thresholds are available on a special ordering basis. Please consult Impala marketing for conditions surrounding custom thresholds.
Impala Linear Corporation
ILC514x 1.1
(408) 574-3939
www.impalalinear.com
Dec 2000
5
CMOS Multilevel Voltage Detector Packaging Information
M Package, 8-Pin Small-Outline
0.197 0.190
Advance
Pin 1 identifier
0.155 0.150
0.244 0.228
0.069 0.053 0.060 0.040 0.019 0.013
0.012 0.009
0.8
0.011 0.004
0.050 0.016
N Package, 8-Pin Plastic Dual In-Line
0.019 0.013
0.260 0.240
0.260 0.240 0.260 0.240 0.260 0.240 0.260 0.240
0.260 0.240
0.260 0.240 0.260 0.240
Life Support Policy Impala Linear Corporation's products are not authorized for use as critical components in life support devices or systems. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labelling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonbly expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
Devices sold by Impala Linear Corporation are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Impala Linear Corporation makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Impala Linear Corporation makes no warranty of merchantability or fitness for any purpose. Impala Linear Corporation reserves the right to discontinue production and change specifications and prices at any time and without notice. This product is intended for use in normal commercial applications. Applications requiring an extended temperature range, unusual environmental requirements, or high reliability applications, such as military and aerospace, are specifically not recommended without additional processing by Impala Linear Corporation. Impala Linear Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in an Impala Linear Corporation product. No other circuits, patents, licenses are implied.
Impala Linear Corporation
ILC514x 1.1
(408) 574-3939
www.impalalinear.com
Dec 2000
6

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