ST5R00 SERIES MICROPOWER VFM STEP-UP DC/DC CONVERTER VERY LOW SUPPLY CURRENT REGULATED OUTPUT VOLTAGE WIDE RANGE OF OUTPUT VOLTAGE AVAILABLE (2.5V, 2.8V, 3.0V, 3.3V, 5.0V) OUTPUT VOLTAGE ACCURACY 5% OUTPUT CURRENT UP TO 100mA LOW RIPPLE AND LOW NOISE VERY LOW START-UP VOLTAGE SOT23-5L HIGH EFFICIENCY (V = 5V TYP. 87%) OUT FEW EXTERNAL COMPONENTS VERY SMALL PACKAGE: SOT23-5L the use of small, low cost inductors. Only three DESCRIPTION external components are needed: an inductor a The ST5R00 is an high efficiency VFM Step-up diode and an output capacitor. DC/DC converter for small, low input voltage or The ST5R00 is suitable to be used in a battery battery powered systems with ultra low quiescent powered equipment where low noise, low ripple supply current. The ST5Rxx accept a positive and ultra low supply current are required. The input voltage from start-up voltage to V and OUT ST5R00 is available in very small packages: convert it to a higher output voltage in the 2.5 to SOT23-5L. 5V range. Typical applications are pagers, cameras & video The ST5R00 combine ultra low quiescent supply camera, cellular telephones, wireless telephones, current and high efficiency to give maximum palmtop computer, battery backup supplies, battery life. The high switching frequency and the battery powered equipment. internally limited peak inductor current, permits Figure 1: Schematic Diagram Rev. 6 June 2005 1/15 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) ST5R00 SERIES Table 1: Absolute Maximum Ratings Symbol Parameter Value Unit V Output Voltage 5.5 V OUT V Input Voltage 5.5 V IN V LX Pin Voltage 5.5 V LX I LX Pin Output Current Internally limited LX P Power Dissipation at 25C 170 (*) mW TOT T Storage Temperature Range -55 to 125 C STG T Operating Junction Temperature Range -25 to 85 C OP (*) Reduced by 1.7 mW for increasing in T of 1C over 25C A Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 2: Thermal Data Symbol Parameter SOT23-5L Unit R Thermal Resistance Junction-case 63 C/W thj-case Figure 2: Connection Diagram (top view) Table 3: Order Codes SOT23-5L OUTPUT VOLTAGES ST5R25MTR 2.5 V ST5R28MTR 2.8 V ST5R30MTR 3.0 V ST5R33MTR 3.3 V ST5R50MTR 5.0 V 2/15 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)