TC4626MJA

TC4626/TC4627 Power CMOS Drivers With Voltage Tripler Features: General Description: • • • • • • The TC4626/TC4627 are single CMOS high-speed drivers with an on-board voltage boost circuit. These parts work with an input supply voltage from 4 to 6 volts. The internal voltage booster will produce a VBOOST potential up to 12 volts above VIN. This VBOOST is not regulated, so its voltage is dependent on the input VDD voltage and output drive loading requirements. An internal undervoltage lockout circuit keeps the output in a low state when VBOOST drops below 7.8 volts. Output is enabled when VBOOST is above 11.3 volts. Power Driver With On-Board Voltage Booster Low IDD: < 4 mA Small Package: 8-Pin PDIP Undervoltage Circuitry Fast Rise/Fall Time: 8.5V, Figure 3-1 Voltage Booster Undervoltage Threshold Start-Up Voltage DS20001426D-page 2 UV @VBOOST 7.0 7.8 8.5 V VSTART @VBOOST 10.5 11.3 12 V IL = 10mA, VDD = 5V RLOAD = 10 kΩ  2001-2014 Microchip Technology Inc. TC4626/TC4627 TC4626/TC4627 ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics: TA = +25°C, VDD= 5V, C1 = C2 = C3 10µF unless otherwise noted. Parameter @VDD = 5V Symbol Min. Typ. Max. Units VBOOST 14.6 — — V Test Conditions No Load Power Supply Power Supply Current IDD — — 2.5 mA Supply Voltage VDD 4.0 — 6.0 V Logic 1, High Input Voltage VIH 2.4 — — V Logic 0, Low Input Voltage VIL — — 0.8 V Input Current IIN -10 — 1 µA VIN = Low or High Input 0VVINVBOOST Output High Output Voltage VOH VDRIVE – 0.025 — — V Low Output Voltage VOL — — 0.025 V Output Resistance, High RO — 15 15 20 25 RO — 10 10 13 15 IPK — 1.5 — A Rise Time tR — — 55 ns Figure 3-1, Figure 3-2 Fall Time tF — — 50 ns Figure 3-1, Figure 3-2 Delay Time tD1 — — 60 ns Figure 3-1, Figure 3-2 Delay Time tD2 — — 70 ns Figure 3-1, Figure 3-2 FMAX 750 — — kHz Voltage Boost Output Source Resistance R3 — 400 500 Ω Voltage Doubler Output Source Resistance R2 — 170 300 Ω Oscillator Frequency FOSC 5 — 50 kHz Oscillator Amplitude Measured at C1- VOSC 4.5 — 10 V Output Resistance, Low Peak Output Current Ω IOUT = 10 mA, VDD = 5V C & E Version (TA = +70°C or +85°C) M Version (TA = +125°C) Ω IOUT = 10 mA, VDD = 5V C & E Version (TA = +70°C or +85°C) M Version (TA = +125°C) Switching Time Maximum Switching Frequency VDD = 5V, VBOOST > 8.5V, Figure 3-1 Voltage Booster UV @VBOOST 7.0 7.8 8.5 V VSTART @VBOOST 10.5 11.3 12 V VBOOST 14.6 — — V Power Supply Current IDD — — 4 mA Supply Voltage VDD 4.0 — 6.0 V Undervoltage Threshold Start-Up Voltage @VDD = 5V IL = 10 mA, VDD = 5V RLOAD = 10 kΩ No Load Power Supply  2001-2014 Microchip Technology Inc. VIN = Low or High DS20001426D-page 3 TC4626/TC4627 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: Pin No. (8-Pin PDIP, CERDIP) PIN FUNCTION TABLE Pin No. (16-Pin SOIC Wide) Symbol Description 1 1 C1- See Section 3.1 “Booster Function” for description 2 3 C1+ See Section 3.1 “Booster Function” for description See Section 3.1 “Booster Function” for description 3 5 C2 4 8 GND Ground. Output 5 9 OUT 6 11 VBOOST 7 13 IN Control Input 8 16 VDD Supply Input — 2, 4, 6, 7, 10, 12, 14, 15 NC Not connected. DS20001426D-page 4 See Section 3.1 “Booster Function” for description  2001-2014 Microchip Technology Inc. TC4626/TC4627 3.0 APPLICATIONS INFORMATION VBOOST VBOOST C3 10ȝF 0.1ȝF Ceramic C3 10ȝF 6 Input 6 7 2 C1 10ȝF 1 3 5 C1+ Output CL = 1000pF 7 2 C1 10ȝF 1 TC4626 C2 10ȝF 8 3 VDD = 5V 5 C1+ C2 TC4627 8 Input VDD = 5V 4 +5V 90% Output CL = 1000pF C1- C2 10ȝF 4 +5V 0V Input C1- C2 0.1ȝF Ceramic 90% Input 10% VBOOST tD1 tF tD2 0V tR VBOOST 90% 90% Output 0V tD1 90% 10% 10% Inverting Driver Switching  2001-2014 Microchip Technology Inc. 90% tD2 tF tR Output Input: 100kHz,square wave, tRISE = tFALL ≤ 10ns FIGURE 3-1: Time. 10% 10% 0V 10% Input: 100kHz,square wave, tRISE = tFALL ≤ 10ns FIGURE 3-2: Switching Time. Noninverting Driver DS20001426D-page 5 TC4626/TC4627 3.1 BOOSTER FUNCTION The voltage booster is an unregulated voltage tripler circuit. The tripler consists of three sets of internal switches and three external capacitors. S1a and S1b charge capacitor C1 to VDD potential. S2a and S2b add C1 potential to VDD input to charge C2 to 2 x VDD. S3a and S3b add C1 potential to C2 to charge C3 to 3 x VDD. The position of the switches is controlled by the internal four-phase clock. 6 3 x VDD, VBOOST 6 + C3 S3a 2 x VDD 3 + S2a C2 (4 to 6V) VDD S3b 8 S1a S2b 2 + C1 1 S1b GND 4 FIGURE 3-3: DS20001426D-page 6 Voltage Booster.  2001-2014 Microchip Technology Inc. TC4626/TC4627 Pin 1 CPF 2 Waveforms 3 x VDD 2 x VDD Pin 2 Voltage VDD 2 x VDD Pin 1 Voltage VDD 0 On S1 Off S2 On Off S3 On Off FIGURE 3-4: Position of Switches.  2001-2014 Microchip Technology Inc. DS20001426D-page 7 TC4626/TC4627 4.0 TYPICAL CHARACTERISTICS The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. Note: TC4626 VOH vs. Frequency TC4626 VOH vs. Frequency 16 VS = 5V TA = -55°C 470pF 14 14 12 VOUT HI (Volts) VOUT HI (Volts) 12 10 2200pF 8 1000pF 6 10 8 6 2200pF 4 4 2 2 0 10 500 1,000 1,500 2,000 2,500 3,000 3,500 FREQUENCY (kHz) 500 1,000 1,500 2,000 2,500 3,000 3,500 FREQUENCY (kHz) Delay Time vs. Temperature TC4626 VOH vs. Frequency 100 14 VS = 5V TA = 125°C 12 10 80 470pF Time (nsec) VOUT HI (Volts) 1000pF 0 5 8 6 2200 pF 1000pF Input = 0-5V; TR& TF