CYT 6606 300mA CMOS Low Noise LDO Regulator Features General Description The CYT6606 series of fixed output low dropout linear regulators are designed for portable battery powered applications, which require low power consumption, low noise environment, and low dropout voltage. Each device contains a bandgap voltage reference, an error amplifier, a PMOS power transistor, and resistors for setting output voltage, and current limit and temperature limit protection circuits. The CYT6606 has been designed to be usedwith low cost capacitors and requires a minimum output capacitor of 1.0µF. The devices are available in fixed voltages range from 1.3V to 4.4Vwith 0.1V per step. ■ ■ ■ ■ ■ ■ ■ ■ Typical 200mV Dropout Voltage at 150mA. Fast Enable Turn-On Time of 20µs (Typ.) Excellent Line and Load Regulation. High Accuracy Output Voltage of 2%. Ultra-Low Ground Current at 20µA (Typ.) Disable Current Less than 0.01µA (Typ.) Over Current and thermal Protection. Standard SOT-23-5L and TSOP-5 Package. Applications ■ ■ ■ ■ ■ ■ USB removable devices MPEG4 devices Wireless LAN’s Hand-Held Instrumentation. Portable DVD players Digital camera SOT-23-5 Package ShenZhen CYT IC Design CO ,Ltd 1 CYT 6606 Pin Configuration 1.VIN 2.GND 3.EN 4.BYPASS 5.VOUT SOT-23-5L / TSOP-5 Typical Application VIN=5V VIN CIN:2.2uF ON VOUT CYT6606-3.3V EN BYPASS GND OFF VOUT=3.3V COUT:2.2uF CB:0.1uF Block Diagram CYT6606-3.3 ShenZhen CYT IC Design CO ,Ltd 2 CYT 6606 Ordering/Marking Information CYT6606- X X X PIN ： G: VIN/GND/EN/BYPASS/VOU Package Type: L : SOT-23-5L Output Voltage:1 A:Vout=3.3V 2 B:Vout=2.8V 3 C:Vout=2.5V 4 D:Vout=1.8V 5 E:Vout=1.5V 6 F: Vout=3.0V Operating Rating (1) Parameter Symbol Value Units Supply Input Voltage VIN 5 V Junction Temperature TJ 0 to +125 ℃ Absolute Maximum Rating (2) Parameter Symbol Value Units Input Supply Voltage VIN 6 V Enable Voltage VEN -0.3 to VIN V Output Voltage VOUT -0.3 to 4.6 V Power Dissipation PD Internally Limited (3) Output Short Circuit Duration Infinite Thermal Resistance, Junction-to-Ambient ӨJA 230(SOT-23) ℃/W 260 ℃ Lead Temperature (Soldering,5 sec.) Junction Temperature TJ 0 to +150 ℃ Storage Temperature TS -40 to +150 ℃ ShenZhen CYT IC Design CO ,Ltd 3 CYT 6606 Electrical Characteristics VIN = 5V; IOUT = 10mA, CIN = 2.2µF; COUT = 2.2µF; Symbol TJ = 25°C; unless otherwise specified. Parameter Conditions Min Typ Max Units VOUT Output Voltage Accuracy CYT6606-1.5V CYT6606-1.8V CYT6606-2.5V CYT6606-2.8V CYT6606-3.0V CYT6606-3.3V 1.470 1.764 2.450 2.744 2.940 3.234 1.5 1.8 2.5 2.8 3.0 3.3 1.530 1.836 2.550 2.856 3.060 3.366 V △VOUT/△T Output Voltage Temperature Coefficient Note4 -- 0.26 -- mV/℃ △VOUT/VOUT Line Regulation VIN=VOUT+1V to 5.0V -- 0.3 -- ％/V IOUT=10 to 300mA -- 2.0 -- ％ IOUT=10mA -- 8 -- IOUT=150mA -- 140 -- IOUT=300mA -- 310 -- Thermal Protection Temperature -- 130 -- Protection Hysterisys -- 15 -- F=10KHz, Bypass=0.1uF -- 70 -- VEN=0V -- 0.1 -- VEN=VTH(EN) ; IOUT=10mA -- 22 -- Voltage Increasing, Output Tums On, Logic High 1.6 -- -- Voltage Decreasing, Output Tums Off, Logic Low -- -- 0.4 VOUT=0V -- 600 -- △VOUT/VOUT VIN-VOUT TPROTECTION Load Regulation (5) (6) Dropout Voltage Thermal Protection PSRR Ripple Rejection IQ Quiescent Current VTH(EN) ILIMIT Enable Input Threshold Voltage Current Limit mV ℃ dB uA V mA Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating rating. Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature,and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details Note 4: Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range. Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 0.1mA to 300mA. Changes in output voltage due to heating effects arecovered by the thermal regulation specification. Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. ShenZhen CYT IC Design CO ,Ltd 4 CYT 6606 Typical Performance Characteristics ShenZhen CYT IC Design CO ,Ltd 5 CYT 6606 Application Hints Like any low dropout regulator, CYT6606 requiresexternal capacitors to ensure stability. Theexternal capacitors must be carefully selected toensure performance. Input Capacitor An input capacitor of at least 1µF is required.Ceramic or Tantalum can be used. increase without upper limit. The value canbe Output Capacitor An output capacitor is required for stability. It mustbe placed no more than 1 cm away from the VOUTpin, and connected directly between VOUT and GNDpins. The minimum value is 1µF but may beincrease without limit. Thermal Considerations It is important that the thermal limit of the package isnot exceeded. The CYT6606 has built-in thermalprotection. When the thermal limit is exceeded,the IC will enter protection, and VOUT will be pulledto ground. The power dissipation for a givenapplication can be calculated as following: The power dissipation (PD) is PD = IOUT * [VIN – VOUT] The thermal limit of the package is then limited toPD(MAX) = [TJ – TA]/ΘJA where TJ is the junctiontemperature, TA is the ambient temperature, andΘJAis around 230°C/W for CYT6606. CYT6606 isdesigned to enter thermal protection at 150°C. Forexample, if TA ShenZhen CYT IC Design CO ,Ltd 6 CYT 6606 Outline Drawing SOT-23-5 DIM A B C D E F H J K N DIMENSIONS INCHES MM MIN MAX MIN MAX 0.110 0.120 2.80 3.05 0.059 0.070 1.50 1.75 0.036 0.051 0.90 1.30 0.014 0.020 0.35 0.50 - 0.037 - 0.95 - 0.075 - 1.90 - 0.006 - 0.15 0.0035 0.008 0.090 0.20 0.102 0.118 2.60 3.00 ShenZhen CYT IC Design CO ,Ltd 7