MAX662A 19-0253 Rev 1 8/94 +12V, 30mA Flash Memory Programming Supply General Description Features The MAX662A is a regulated +12V, 30mA-output, charge- Regulated +12V 5% Output Voltage pump DC-DC converter. It provides the necessary +12V 4.5V to 5.5V Supply Voltage Range 5% output to program byte-wide flash memories, and requires no inductors to deliver a guaranteed 30mA out- 2 Fits in 0.1in 2 put from inputs as low as 4.75V. It fits into less than 0.1in Guaranteed 30mA Output of board space. The MAX662A is a pin-compatible upgrade to the MAX662, and is recommended for new No InductorUses Only 4 Capacitors designs. The MAX662A offers lower quiescent and shut- 185A Quiescent Current down currents, and guarantees the output current over all temperature ranges. Logic-Controlled 0.5A Shutdown The MAX662A is the first charge-pump boost converter to 8-Pin Narrow SO and DIP Packages provide a regulated +12V output. It requires only a few inexpensive capacitors, and the entire circuit is complete- ly surface-mountable. Ordering Information A logic-controlled shutdown pin that interfaces directly with microprocessors reduces the supply current to only PART TEMP. RANGE PIN-PACKAGE 0.5A. The MAX662A comes in 8-pin narrow SO and DIP MAX662ACPA 0C to +70C 8 Plastic DIP packages. MAX662ACSA 0C to +70C 8 SO For higher-current flash memory programming solutions, MAX662AC/D 0C to +70C Dice* refer to the data sheets for the MAX734 (120mA output current, guaranteed) and MAX732 (200mA output cur- MAX662AEPA -40C to +85C 8 Plastic DIP rent, guaranteed) PWM, switch-mode DC-DC converters. MAX662AESA -40C to +85C 8 SO Or, refer to the MAX761 data sheet for a 150mA, PFM MAX662AMJA -55C to +125C 8 CERDIP** switch-mode DC-DC converter that operates from inputs * Dice are tested at T = +25C. A as low as 2V. ** Contact factory for availability and processing to MIL-STD-883. Applications +12V Flash Memory Programming Supplies Compact +12V Op-Amp Supplies Switching MOSFETs in Low-Voltage Systems Dual-Output +12V and +20V Supplies Typical Operating Circuit Pin Configuration INPUT 4.75V TO 5.5V TOP VIEW 4.7F OUTPUT 12V 5% V CC 30mA C1- 1 8 SHDN SHDN V V pp OUT C1+ GND 2 7 FLASH MAX662A MAX662A MEMORY V C2- 3 6 OUT C1+ C2- 0.22F 0.22F 4.7F V C2+ 4 5 CC C1- C2+ GND DIP/SO Maxim Integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature. EVALUATION KIT MANUAL FOLLOWS DATA SHEET+12V, 30mA Flash Memory Programming Supply ABSOLUTE MAXIMUM RATINGS V to GND ................................................................-0.3V to 6V Operating Temperature Ranges CC SHDN..........................................................-0.3V to (V + 0.3V) MAX662AC A .....................................................0C to +70C CC I Continuous..................................................................50mA MAX662AE A ..................................................-40C to +85C OUT Continuous Power Dissipation (T = +70C) MAX662AMJA................................................-55C to +125C A Plastic DIP (derate 9.09mW/C above +70C) ............727mW Storage Temperature Range .............................-65C to +160C SO (derate 5.88mW/C above +70C).........................471mW Lead Temperature (soldering, 10sec) .............................+300C CERDIP (derate 8.00mW/C above +70C).................640mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (Circuit of Figure 3a, V = 4.5V to 5.5V, T = T to T , unless otherwise noted.) CC A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 0mA I 30mA, OUT 11.4 12 12.6 V = 4.75V to 5.5V CC MAX662AC/E 0mA I 20mA 11.4 12 12.6 OUT Output Voltage V V OUT 0mA I 24mA, OUT 11.4 12 12.6 V = 4.75V to 5.5V CC MAX662AM 0mA I 16mA 11.4 12 12.6 OUT Supply Current I No load, V = 0V 185 500 A CC SHDN Shutdown Current No load, VSHDN = VCC 0.5 10 A Oscillator Frequency f V = 5V, I = 30mA 500 kHz OSC CC OUT Power Efficiency V = 5V, I = 30mA 76 % CC OUT MAX662AC/E 12 VCC = VSHDN = 5V, V -to-V Switch Impedance R k CC OUT SW I = 30mA MAX662AM 1 2.5 OUT V 2.4 IH Shutdown Input Threshold V V 0.4 IL V = 5V, V = 0V -50 -15 -5 CC SHDN SHDN Pin Current A V = V = 5V 0 CC SHDN Typical Operating Characteristics (Circuit of Figure 3a, T = +25C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE OUTPUT VOLTAGE vs. OUTPUT CURRENT EFFICIENCY vs. LOAD CURRENT 300 12.6 100 CONTINUOUS OUTPUT CURRENT MUST 280 12.4 NOT EXCEED 50mA ABS MAX LIMIT. 90 T = -55C A INTERMITTENT PEAK CURRENTS MAY 260 12.2 V = 5.5V CC BE HIGHER. 80 240 12.0 220 11.8 70 V = 4.5V CC 200 11.6 T = 0C V = 4.5V A CC V = 4.75V CC 60 V = 4.75V 180 CC 11.4 T = +25C A V = 5.0V VCC = 5.0V CC 160 11.2 50 V = 5.5V CC CONTINUOUS OUTPUT CURRENT 140 T = +125C A 11.0 MUST NOT EXCEED 50mA ABS MAX 40 120 LIMIT. INTERMITTENT PEAK 10.8 CURRENTS MAY BE HIGHER. 100 10.6 30 4.50 4.75 5.00 5.25 5.50 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 SUPPLY VOLTAGE (V) OUTPUT CURRENT (mA) LOAD CURRENT (mA) 2 MAX662A SUPPLY CURRENT (A) MAX662A-01 OUTPUT VOLTAGE (V) MAX662A-02 EFFICIENCY (%) MAX662A-03