Electronic Components Datasheet Search |
|
US1206 Datasheet(PDF) 3 Page - UNISEM |
|
US1206 Datasheet(HTML) 3 Page - UNISEM |
3 / 7 page US1206/1207/1208/1209 2-3 Rev. 1.1 6/26/00 Pin DescRIPTIONS Pin DescRIPTIONS PIN DESCRIPTION A resistor divider from this pin to the Vout pin and ground sets the output voltage. An open collector output that switches low when the output voltage drops about 4% below its expected regulated voltage. The output of the regulator .A minimum of 2.2uF capacitor must be connected from this pin to ground. Ground pin. This pin must be connected to the lowest poten- tial in the system & all other pins must be at higher potential with respect to this pin. Enable pin. A low signal or left open on this pin shuts down the output.This pin must be tied HI or to Vin for normal operation. The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimumdrop out voltage during the load transient response. This pin must al- ways be 0.6V higher than Vout in order for thedevice to regu- late properly. APPLICATION INFORMATION APPLICATION INFORMATION Stability The US120X series of regulators require the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. A minimum of 2.2uF capacitance and the ESR in the range of 0.5 to 2 ohm insures the stability of the system. Part Number Output Voltage US1206-18 1.8V US1206-25 2.5V US1206-33 3.3V US1207-18 1.8V US1207-25 2.5V US1207-33 3.3V US1208 1.24V US1209 1.24V Table 1- Output voltage v.s. part number Note 1 : Low duty cycle pulse testing with Kelvin con- nections are required in order to maintain accurate data. Note 2 : Drop-out voltage is defined as the minimum differential voltage between Vin and Vout required to main- tain regulation at Vout. It is measured when the output voltage drops 1% below its nominal value. US1207,1208 SYM TEST CONDITION MIN TYP MAX UNITS Ground Current-S.D Activated Iqsd Enable=0V 0.01 1 uA Enable pin input LO voltage Venl Regulator OFF (Note 4) 0.8 V Enable pin input HI voltage Venh Regulator ON (Note 4) 2 V Enable pin input LO current Venl=0V to 0.8V (Note 4) 0.1 2 uA Enable pin input HI current Venh=2V to Vin (Note 4) 100 600 uA US1207,1209 Flag Output Threshold Voltage Vthfg 3.8 %Vo Flag Output Hysterises Voltage Vhys Output Ramping Up 0.8 %Vo Flag Output Saturation Voltage Vfsat Io=5mA 400 mV Io=500uA 230 mV Note 3 : Ground current is the the regulator quiescent current plus the pass transistor current. The total cur- rent from the supply is the sum of the load current plus the ground pin current. Note 4 : The specification applies for the junction tem- perature of 0 to +125 °C. PIN SYMBOL Adj US1208,1209 Flag US1208 Vout All devices GND All devices Enable US1207,1209 Vin All devices |
Similar Part No. - US1206 |
|
Similar Description - US1206 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |