MAX1044_V02 MAXIM | Alldatasheet

Document overview

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Technical content

Features

  • Miniature μMAX Package
  • 1.5V to 10.0V Operating Supply Voltage Range
  • 98% Typical Power-Conversion Efficiency
  • Invert, Double, Divide, or Multiply Input Voltages
  • BOOST Pin Increases Switching Frequencies (MAX1044)
  • No-Load Supply Current: 200μA Max at 5V
  • No External Diode Required for Higher-Voltage Operation 19-4667; Rev 2; 2/17 Ordering Information appears at end of data sheet. NEGATIVE VOLTAGE CONVERTER CAP+ CAP- VOUT GND INPUT SUPPLY VOLTAGE NEGATIVE OUTPUT VOLTAGE MAX1044 ICL7660 MAX1044 ICL7660 CAP- GND CAP+ (N.C.) BOOST VOUT LV OSC TOP VIEW ( ) ARE FOR ICL7660 DIP/SO/µMAX TO-99 ICL7660 N.C. CAP+ GND CAP- VOUT LV OSC V+ AND CASE Typical Operating Circuit Pin Configurations MAX1044/ICL7660 Switched-Capacitor Voltage Converters

Continuous Power Dissipation (TA = +70°C) Operating Temperature Ranges (Circuit of Figure 1, V+ = 5.0V, LV pin = 0V, BOOST pin = open, I LOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted.) Note 1: The Maxim ICL7660 and MAX1044 can operate without an external output diode over the full temperature and voltage ranges. The Maxim ICL7660 can also be used with an external output diode in series with pin 5 (cathode at V OUT) when replacing the Intersil ICL7660. Tests are performed without diode in circuit. Note 2: fOSC is tested with COSC = 100pF to minimize the effects of test fixture capacitance loading. The 1pF frequency is correlated to this 100pF test point, and is intended to simulate pin 7’s capacitance when the device is plugged into a test socket with no external capacitor. For this test, the LV pin is connected to GND for comparison to the original manufacturer’s device, which automatically connects this pin to GND for (V+ > 3V). Absolute Maximum Ratings 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

RL = ∞, pins 1 and 7 no connection, LV open TA = +25°C 30 200 80 175 µA TA = 0°C to +70°C 200 225 TA = -40°C to +85°C 200 250 TA = -55°C to +125°C 200 250 RL = ∞, pins 1 and 7 = V+ = 3V 10 Supply Voltage Range (Note 1) RL = 10kΩ, LV open 3.0 10.0 V RL = 10kΩ, LV to GND 1.5 10 1.5 3.5 Output Resistance IL = 20mA, fOSC = 5kHz, LV open TA = +25°C 65 100 55 100 Ω TA = 0°C to +70°C 130 120 TA = -40°C to +85°C 130 140 TA = -55°C to +125°C 150 150 fOSC = 2.7kHz (ICL7660), fOSC = 1kHz (MAX1044), V+ = 2V, IL = 3mA, LV to GND TA = +25°C 325 250 TA = 0°C to +70°C 325 300 TA = -40°C to +85°C 325 300 TA = -55°C to +125°C 400 400 Oscillator Frequency COSC = 1pF, LV to GND (Note 2) V+ = 5V 5 10 kHz V+ = 2V 1 Power Efficiency RL = 5kΩ, TA = +25°C, fOSC 5kHz, LV open 95 98 95 98 % Voltage Conversion Efficiency RL = ∞, TA = +25°C, LV open 97.0 99.9 99.0 99.9 % Oscillator Sink or Source Current VOSC = 0V or V+, LV open Pin 1 = 0V 3 µA Pin 1 = V+ 20 Oscillator Impedance TA = +25°C V+ = 2V 1.0 1.0 MΩ V+ = 5V 100 100 kΩ MAX1044/ICL7660 Switched-Capacitor Voltage Converters www.maximintegrated.com Maxim Integrated │ 2

(V+ = 5V; CBYPASS = 0.1μF; C1 = C2 = 10μF; LV = open; OSC = open; TA = +25°C; unless otherwise noted.) Typical Operating Characteristics OUTPUT VOLTAGE AND OUTPUT RIPPLE vs. LOAD CURRENT MAX1044-Fig 1 LOAD CURRENT (mA) OUTPUT VOLTAGE (V) OUTPUT RIPPLE (mVp-p) 987654321 -0.5 -1.0 -1.5 -2.0 100 200 150 300 250 400 350 0 10 OUTPUT VOLTAGE V+ = 2V LV = GND OUTPUT RIPPLE A: MAX1044 WITH BOOST = V+ B: ICL7660 C: MAX1044 WITH BOOST = OPEN A B C EFFICIENCY AND SUPPLY CURRENT vs. LOAD CURRENT MAX1044-Fig 4 LOAD CURRENT (mA) EFFICIENCY (%) 7 8 964 52 31 100 10 0 0 0 10 SUPPLY CURRENT (mA) SUPPLY CURRENT EFFICIENCY V+ = 2V LV = GND OUTPUT VOLTAGE AND OUTPUT RIPPLE vs. LOAD CURRENT MAX1044-Fig 2 LOAD CURRENT (mA) OUTPUT VOLTAGE (V) 353020 2510 155 -5.0 800 720 640 560 480 400 320 240 160 0 0 0 40 -0.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -1.5 -1.0 OUTPUT RIPPLE (mVp-p) OUTPUT VOLTAGE OUTPUT RIPPLE V+ = 5V LV = OPEN A A B C B C A: MAX1044 WITH BOOST = V+ B: ICL7660 C: MAX1044 WITH BOOST = OPEN EFFICIENCY AND SUPPLY CURRENT vs. LOAD CURRENT MAX1044-Fig 5 LOAD CURRENT (mA) EFFICIENCY (%) 353020 2510 155 100 50 0 0 0 40 SUPPLY CURRENT (mA)

20 V+ = 5V

LV = OPEN EFFICIENCY A: MAX1044 WITH BOOST = V+ B: ICL7660 C: MAX1044 WITH BOOST = OPEN SUPPLY CURRENT B C A OUTPUT VOLTAGE AND OUTPUT RIPPLE vs. LOAD CURRENT MAX1044-Fig 3 LOAD CURRENT (mA) OUTPUT VOLTAGE (V) 353020 2510 155 -10 700 630 560 490 420 350 280 210 140 0 0 0 40 OUTPUT RIPPLE (mVp-p) V+ = 10V LV = OPEN OUTPUT RIPPLE A B A: MAX1044 WITH BOOST = V+ B: ICL7660 C: MAX1044 WITH BOOST = OPEN C B C AOUTPUT VOLTAGE EFFICIENCY AND SUPPLY CURRENT vs. LOAD CURRENT MAX1044-Fig 6 LOAD CURRENT (mA) EFFICIENCY (%) 353020 2510 155 100 50 0 0 0 40 SUPPLY CURRENT (mA) V+ = 10V LV = OPEN A: MAX1044 WITH BOOST = V+ B: ICL7660 C: MAX1044 WITH BOOST = OPEN SUPPLY CURRENT B, C EFFICIENCY A MAX1044/ICL7660 Switched-Capacitor Voltage Converters Maxim Integrated │ 3 www.maximintegrated.com

vs. TEMPERATURE MAX1044-Fig 10 TEMPERATURE (°C) OSCILLATOR FREQUENCY (kHz) 1007550250-25 100 -50 125 A: MAX1044 WITH BOOST = V+ B: ICL7600 C: MAX1044 WITH BOOST = OPEN B A C QUIESCENT CURRENT vs. OSCILLATOR FREQUENCY MAX1044-Fig 11 OSCILLATOR FREQUENCY (Hz) QUIESCENT CURRENT (μA) 105104103102 100 1000 10,000 100 101 5x105 USING EXTERNAL HCMOS OSCILLATOR USING EXTERNAL CAPACITOR EFFICIENCY vs. OSCILLATOR FREQUENCY MAX1044-Fig 7 OSCILLATOR FREQUENCY (Hz) EFFICIENCY (%) 105104103102 100 101 6x105 C1, C2 = 100µF C1, C2 = 10µF C1, C2 = 1µF EXTERNAL HCMOS OSCILLATOR OSCILLATOR FREQUENCY vs. EXTERNAL CAPACITANCE MAX1044-Fig 8 COSC (pF) OSCILLATOR FREQUENCY (Hz) 10,000100010010 100 1000 10,000 100,000 0.1 1 100,000 ICL7660 AND MAX1044 WITH BOOST = OPEN MAX1044 WITH BOOST -V+ OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE MAX1044-Fig 9 SUPPLY VOLTAGE (V) OSCILLATOR FREQUENCY (Hz) 98765432 1000 10,000 100,000 1 10 FROM TOP TO BOTTOM AT 5V MAX1044, BOOST = V+, LV = GND MAX1044, BOOST = V+, LV = OPEN ICL7660, LV = GND ICL7660, LV = OPEN MAX1044, BOOST = OPEN, LV = GND MAX1044, BOOST = OPEN, LV = OPEN MAX1044/ICL7660 Switched-Capacitor Voltage Converters Maxim Integrated │ 4 www.maximintegrated.com Typical Operating Characteristics (TA = +25°C, unless otherwise noted.)

(V+ = 5V; CBYPASS = 0.1μF; C1 = C2 = 10μF; LV = open; OSC = open; TA = +25°C; unless otherwise noted.) Typical Operating Characteristics (continued) QUIESCENT CURRENT vs. SUPPLY VOLTAGE 1044-Fig 12 SUPPLY VOLTAGE (V) QUIESCENT CURRENT (μA) 98765432 100 1000 2000 0.1 1 10 A B D C A: MAX1044, BOOST = V+, LV = GND B: MAX1044, BOOST = V+, LV = OPEN C: ICL7660 AND MAX1044 WITH BOOST = OPEN, LV = GND; ABOVE 5V, MAX1044 ONLY D: ICL7660 AND MAX1044 WITH BOOST = OPEN, LV = OPEN QUIESCENT CURRENT vs. TEMPERATURE MAX1044-Fig 13 TEMPERATURE (°C) QUIESCENT CURRENT (μA) 1007550250-25 100 200 300 400 500 -50 125 ICL7660, MAX1044 WITH BOOST = OPEN MAX1044 WITH BOOST = V+ OUTPUT RESISTANCE vs. OSCILLATOR FREQUENCY MAX1044-Fig 14 FREQUENCY (Hz) RESISTANCE (Ω) 105104103102 200 100 400 300 700 600 500 1000 900 800 C1, C2 = 100µF C1, C2 = 1µF C1, C2 = 10µF EXTERNAL HCMOS OSCILLATOR OUTPUT RESISTANCE vs. SUPPLY VOLTAGE MAX1044-Fig 15 SUPPLY VOLTAGE (V) OUTPUT RESISTANCE (Ω) 98765432 120 100 180 160 140 200 1 10 OUTPUT RESISTANCE vs. TEMPERATURE MAX1044-Fig 16 TEMPERATURE (°C) OUTPUT RESISTANCE (Ω) 120100806040200-20-40 -60 140 ICL7660, MAX1044 WITH BOOST = OPEN MAX1044 WITH BOOST = V+ MAX1044/ICL7660 Switched-Capacitor Voltage Converters Maxim Integrated │ 5 www.maximintegrated.com Typical Operating Characteristics (TA = +25°C, unless otherwise noted.)

resistance and the load drains charge from C2. understood by using a switched-capacitor circuit model. charge transferred per cycle is: ΔQ = C1(V+ - V OUT). Figure 1. Maxim MAX1044/ICL7660 Test Circuit Frequency Boost. Connecting BOOST to V+ increases the oscillator frequency by a factor of six. When the oscillator is driven externally, BOOST has no effect and should be left open.

2 CAP+ Connection to positive terminal of Charge-Pump Capacitor

3 GND Ground. For most applications, the positive terminal of the reservoir capacitor is connected to this pin.

4 CAP- Connection to negative terminal of Charge-Pump Capacitor

5 VOUT

6 LV Low-Voltage Operation. Connect to ground for supply voltages below 3.5V. ICL7660: Leave open for supply voltages above 5V. 8 V+ Power-Supply Positive Voltage Input. (1.5V to 10V). V+ is also the substrate connection.

between the V+ and ground pins. the capacitors and the IC as close as possible. done on a double-sided PC board. functions such as driving the switches, oscillator, etc. the LV, BOOST, and OSC pins. and fOSC is the oscillator frequency.

1 C1 ( V ) V2P f /21 C2 V 2V V2

Figure 7. External Clocking

Package Information

For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. GND CAP+ BOOST 0.076" (1.930mm) 0.076" (1.930mm) CAP- VOUT OSCLV TRANSISTOR COUNT: 72 SUBSTRATE CONNECTED TO V+ MAX1044 GND CAP- LV VOUT TRANSISTOR COUNT: 71 SUBSTRATE CONNECTED TO V+ CAP+ 0.084" (2.1mm) 0.060" (1.5mm) OSC ICL7660 PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.

6 TDFN-EP T633-2 21-0036 90-0058

8 Plastic DIP P8+1 21-0043 —

8 SOIC S8+2 21-0041 90-0096

8 CERDIP J8+2 21-0045 —

8 µMAX U8+1 21-0036 90-0092

8 TO-99 T99-8 21-0022 —

MAX1044/ICL7660 Switched-Capacitor Voltage Converters www.maximintegrated.com Maxim Integrated │ 13

Revision History

2 2/17 Updated part numbers in Ordering Information table 13 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. MAX1044/ICL7660 Switched-Capacitor Voltage Converters © 2017 Maxim Integrated Products, Inc. │ 14 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.