LTC1262 12V, 30mA Flash Memory Programming Supply DESCRIPTIO FEATURES n Regulated 12V 5% Output Voltage The LTC 1262 is a regulated 12V, 30mA output DC/DC n No Inductors converter. It is designed to provide the 12V 5% output n Supply Voltage Range: 4.75V to 5.5V necessary to program byte-wide flash memories. The n Guaranteed 30mA Output output will provide up to 30mA from input voltages as low n Low Power: I = 500A as 4.75V without using any inductors. Only four external CC n I in Shutdown: 0.5A capacitors are required to complete an extremely small CC n 8-Pin PDIP or SO-8 Package surface mountable circuit. The TTL compatible shutdown pin can be directly con- APPLICATI S nected to a microprocessor and reduces the supply cur- rent to less than 0.5A. The LTC1262 offers improved n 12V Flash Memory Programming Supplies shutdown current performance and requires fewer exter- n Compact 12V Op Amp Supplies nal components than competing solutions. n Battery-Powered Systems The LTC1262 is available in an 8-pin PDIP or SO-8 package. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATI In/Out of Shutdown 1 8 C1 SHDN FROM MPU 0.22F 2 7 + FLASH 5V C1 GND SHDN MEMORY 4.7F 5V/DIV LTC1262 + 0V 3 6 C2 V VPP OUT 4.7F 0.22F + 12V 4 5 + C2 V V CC CC V OUT LTC1262 TA01 V 5V/DIV 5V CC 4.75V TO 5.5V 0V 1ms/DIV 1262 TA01a 1 O U UO ULTC1262 ABSOLUTEXAI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) Supply Voltage (V ) ................................................ 6V ORDER PART CC TOP VIEW NUMBER Input Voltage (SHDN) ................... 0.3V to V + 0.3V CC C1 1 8 SHDN Output Current (I ) ........................................... 50mA OUT + LTC1262CN8 C1 2 GND 7 Operating Temperature Range LTC1262CS8 C2 3 6 V OUT LTC1262C................................................ 0C to 70C + LTC1262IS8 C2 V 4 5 CC LTC1262I........................................... 40C to 85C N8 PACKAGE S8 PACKAGE Storage Temperature Range ................ 65C to 150C S8 PART MARKING 8-LEAD PDIP 8-LEAD PLASTIC SO Lead Temperature (Soldering, 10 sec)................. 300C T = 150C, = 100C/W (N8) JMAX JA 1262 T = 150C, = 150C/W (S8) JMAX JA 1262I Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS V = 4.75V to 5.5V, T = 40C to 85C, (Notes 2, 3), unless otherwise noted. CC A SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Output Voltage 0mA I 30mA, V = 0V, 0C T 70C l 11.4 12.6 V OUT OUT SHDN A 0mA I 30mA, V = 0V, 40C T 85C l 11.2 12.6 V OUT SHDN A I Supply Current No Load, V = 0V, 0C T 70C l 0.5 1.0 mA CC SHDN A No Load, V = 0V, 40C T 85C l 0.5 1.3 mA SHDN A I Shutdown Supply Current No Load, V = V l 0.5 10 A SHDN SHDN CC f Oscillator Frequency V = 5V, I = 30mA l 300 kHz OSC CC OUT Power Efficiency V = 5V, I = 30mA l 74 % CC OUT R V to V Switch Impedance V = V = 5V, I = 0mA l 0.18 2 k SW CC OUT CC SHDN OUT V SHDN Input High Voltage l 2.4 V IH V SHDN Input Low Voltage l 0.8 V IL SHDN Input Current V = 5V, V = 0V, 0C T 70C l 20 10 5 A CC SHDN A V = 5V, V = 0V, 40C T 85C l 35 10 5 A CC SHDN A V = 5V, V = 5V l 0.06 10 A CC SHDN t Turn-On Time C1 = C2 = 0.22F, C = C = 4.7F, (Figures 1, 2) 500 s ON IN OUT t Turn-Off Time C1 = C2 = 0.22F, C = C = 4.7F, (Figures 1, 2) 3.3 ms OFF IN OUT The l denotes specifications which apply over the full operating Note 2: All currents into device pins are positive all currents out of device temperature range. pins are negative. All voltages are referenced to ground unless otherwise specified. Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired. Note 3: All typicals are given at V = 5V, T = 25C. CC A 2 U W W W U WU