® RT9032 Programmable Dual Output Linear Regulator The RT9032 is a dual channels, low noise and low dropout voltage regulator souring up to 300mA at each channel. The output voltage range is from 1.1V to 3.3V by operating voltage range from 2.5V to 5.5V. The output voltages of the RT9032 can be programmed by setting the voltage of P1 and P2. There are 9 different voltage settings in one chip. User can choose output voltages easily by setting P1, P2 to VDD, GND or floating. The RT9032 offers 3% accuracy, low dropout (330mV @300mA) and extremely low ground current, only 32μA per LDO. The shutdown current is near to zero current which is suitable for battery-powered device. Other features include current limiting, over temperature protection and output short circuit protection. The RT9032 can operate stable with very small ceramic output capacitors, reducing required board space and component cost. The RT9032 is available in WDFN-8L 2x2 and WQFN-8L 1.6x1.6 (COL) packages. Ordering Information RT9032 Package Type QW : WDFN-8L 2x2 (W-Type) QWA : WQFN-8L 1.6x1.6 (COL) (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Output Voltage A : Combination A B : Combination B C : Combination C D : Combination D J : Combination J Note : Richtek products are : ` Wide Operating Voltage Ranges : 2.5V to 5.5V Dual LDO Output Pin Programmable Output Voltage Low-Noise for RF Application No Noise Bypass Capacitor Required Fast Response in Line/Load Transient Low Quiescent Current of 32μ μA/LDO 3% High Output Accuracy Current Limiting Protection Thermal Shutdown Protection Short Circuit Protection Tiny WDFN-8L 2x2 and WQFN-8L 1.6x1.6 (COL) Packages RoHS Compliant and Halogen Free Applications Mobile Phone Smart Hand-Held Devices Digital Still Camera Battery-Powered Equipments PCMCIA Cards Pin Configurations (TOP VIEW) VIN 1 EN1 2 P2 3 P1 4 8 9 7 6 5 VOUT1 VOUT2 GND EN2 WDFN-8L 2x2 VOUT1 VIN EN1 EN2 8 1 7 2 6 3 5 4 VOUT2 P2 GND P1 WQFN-8L 1.6x1.6 (COL) RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. ` Features GND General Description Suitable for use in SnPb or Pb-free soldering processes. Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9032-03 August 2012 Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9032 Typical Application Circuit RT9032 VIN VIN CIN 1µF VOUT1 COUT1 VOUT1 1µF P1 P2 EN1 Chip Enable EN2 VOUT2 COUT2 GND VOUT2 1µF Table for Programmable Output Voltage Setting Combination A (RT9032A) Combination C (RT9032C) P1 State P2 State VOUT1 VOUT2 P1 State P2 State VOUT1 VOUT2 L L 1.5V 2.8V L L 1.8V 2.8V L H 1.8V 2.9V L H 1.8V 2.85V L Open 1.8V 2.8V L Open 1.8V 3V H L 1.8V 2.7V H L 1.85V 2.85V H H 1.8V 2.6V H H 2.6V 2.7V H Open 2.7V 2.8V H Open 2.6V 3.3V Open L 2.8V 2.8V Open L 2.85V 3.3V Open H 2.9V 2.9V Open H 3V 3.3V Open Open 2.8V 3.3V Open Open 3.3V 3.3V Combination B (RT9032B) P1 State P2 State Combination D (RT9032D) VOUT1 VOUT2 P1 State P2 State VOUT1 VOUT2 L 1.8V 2.9V L L 1.2V 2.8V L L H 1.5V 1.8V L H 2.6V 2.8V L Open 1.5V 2.8V L Open 1.8V 2.8V H L 1.8V 2.6V H L 2.9V 2.9V H H 1.8V 2.8V H H 2.8V 3.3V H Open 2.8V 2.8V H Open 2.8V 2.8V Open L 2.8V 3.3V Open L 1.8V 2.6V Open H 3V 3.3V Open H 1.8V 2.7V Open Open 3.3V 3.3V Open Open 1.5V 2.8V Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9032-03 August 2012 RT9032 Combination J (RT9032J) P1 State P2 State VOUT1 VOUT2 L L 3.3V 3.3V L H 1.1V 3.3V L Open 1.2V 2.5V H L 1.8V 3.3V H H 1.1V 1.8V H Open 1.1V 2.5V Open L 1.2V 1.8V Open H 1.2V 3.3V Open Open 1.8V 2.5V Functional Pin Description Pin Number WDFN 2x2 WQFN 1.6x1.6 (COL) Pin Name Pin Function 1 1 VIN Supply Input. 2 2 EN1 Channel 1 Enable Control.(Active High) 3 6 P2 Programming Input 2. The state of P2 selects one of nine output voltage options. 4 4 P1 5 3 EN2 6, 9 (Exposed Pad) Programming Input 1. The state of P1 selects one of nine output voltage options. Channel 2 Enable Control.(Active High) Common Ground. The exposed pad must be soldered to a 5 GND large PCB and connected to GND for maximum power dissipation. 7 7 VOUT2 Channel 2 Output Voltage. 8 8 VOUT1 Channel 1 Output Voltage. Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9032-03 August 2012 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9032 Function Block Diagram Shutdown and Logic Control EN1 VREF - 0.1µA VIN MOS Driver + Error Amplifier VOUT1 VIN Programmable Output Current-Limit and Thermal Protection P1 P2 POR Control VIN Shutdown and Logic Control EN2 VREF - 0.1µA + Error Amplifier www.richtek.com 4 Current-Limit and Thermal Protection VOUT2 Programmable Output Copyright © 2012 Richtek Technology Corporation. All rights reserved. MOS Driver P1 P2 is a registered trademark of Richtek Technology Corporation. DS9032-03 August 2012 RT9032 Absolute Maximum Ratings (Note 1) Supply Input Voltage (VIN) ---------------------------------------------------------------------------------------------I/O Pin Voltage (EN1, EN2, P1, P2, VOUT1, VOUT2) ----------------------------------------------------------Power Dissipation, PD @ TA = 25°C WDFN-8L 2x2 -------------------------------------------------------------------------------------------------------------WQFN-8L 1.6x1.6 (COL) -----------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) WDFN-8L 2x2, θJA --------------------------------------------------------------------------------------------------------WDFN-8L 2x2, θJC --------------------------------------------------------------------------------------------------------WQFN-8L 1.6x1.6 (COL), θJA ------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Model) ---------------------------------------------------------------------------------------------MM (Machine Model) ----------------------------------------------------------------------------------------------------- Recommended Operating Conditions 6.5V 6.5V 0.606W 0.571W 165°C/W 20°C/W 175°C/W 260°C 150°C −65°C to 150°C 2kV 200V (Note 4) Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VIN = VOUTX + 0.7V, VENX = VIN, CIN = COUT1 = COUT2 =1μF, TA = 25°C unless otherwise specified.) Parameter Quiescent Current Symbol (Note5) Shutdown Current Test Conditions Min Typ Max Unit IQ VEN > 1.5V, -- 65 80 μA I SHDN VEN < 0.4V -- -- 1 μA 1.1 -- 3.3 V Output (VOUT1, VOUT2) Output Voltage Range VOUT Dropout Voltage VDROP I OUT = 300mA -- 330 500 mV Output Accuracy ΔV I OUT = 1mA −3 -- +3 % Line Regulation ΔVLINE VIN = 2.5V to 5.5V -- -- 0.2 %/V Load Regulation ΔVLOAD 1mA < I OUT < 300mA -- -- 0.6 % f = 100Hz, ILOAD = 10mA -- 65 -- f = 1kHz, ILOAD = 10mA -- 60 -- f = 10kHz, ILOAD = 10mA -- 50 -- f = 100Hz, ILOAD = 150mA -- 65 -- f = 1kHz, ILOAD = 150mA -- 50 -- f = 10kHz, ILOAD = 150mA -- 50 -- (Note 6) Power Supply Rejection Rate PSRR Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9032-03 August 2012 dB dB is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9032 Parameter Output Voltage Discharge Resistance in Shutdown Output Voltage Temperature Coefficient Symbol Test Conditions VIN = 5V, EN1 = EN2 = GND Min Typ Max Unit -- 20 -- Ω -- 100 -- ppm/°C Enable Pin Input (EN1, EN2) Logic-High VIH VIN = 2.5V to 5.5V, Power On 1.5 -- -- Logic-Low VIL VIN = 2.5V to 5.5V, Shutdown -- -- 0.4 VIN = 2.5V to 5.5V Hi, Lo State -- -- 1k VIN = 2.5V to 5.5V Open State 100k -- -- TD Open pin with input loading ≤ 50pF (Including PAD & PCB trace) -- -- 20 μs Current Limit ILIM RLOAD = 1 Ω 330 430 600 mA Thermal Shutdown Temperature TSD -- 170 -- Thermal Shutdown Hysteresis ΔTSD -- 30 -- EN Threshold Voltage V Tri-State Input (P1, P2) P1/P2 Termination Resistance from input to VDD or GND for setting Hi, Lo, Open States (Note 7) Decision Time Ω Protection °C Note 1. Stresses beyond those listed “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 may affect device reliability. Note 2. θJA is measured at TA = 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3. θJC is measured at the exposed pad of the package. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN - IOUT under no load condition (IOUT = 0mA). The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 6. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV. Note 7. Output voltage VOUT1/VOUT2 are configured by P1/P2 state when EN1 or EN2 go high. Subsequent changes to P1/P2 do not change VOUT1/VOUT2 unless power on reset by VIN or both of EN1 and EN2. Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9032-03 August 2012 RT9032 Typical Operating Characteristics Output Voltage vs. Temperature 3.00 1.95 2.95 1.90 2.90 Output Voltage (V) Output Voltage (V) Output Voltage vs. Temperature 2.00 1.85 1.80 1.75 1.70 1.65 2.85 2.80 2.75 2.70 2.65 VIN = 4.3V, No Load 1.60 -40 -25 -10 5 20 35 50 65 80 VIN = 4.3V, No Load 2.60 95 110 125 -40 -25 -10 Temperature (°C) 20 35 50 65 80 95 110 125 Temperature (°C) Dropout Voltage vs. Load Current Quiescent Current vs. Temperature 60 450 400 50 Dropout Voltage (mV) Quiescent Current (μA) 5 40 30 20 10 VIN = 4.3V 0 -40 -25 -10 5 20 35 50 65 80 125°C 350 25°C 300 250 200 -40°C 150 100 50 VOUT = 2.8V 0 95 110 125 0 50 100 150 200 250 Temperature (°C) Load Current (mA) Line Transient Response Line Transient Response VIN 4.8 (V) 300 VIN 4.8 (V) 3.8 3.8 VOUT1 (20mV/Div) VOUT1 (20mV/Div) VOUT2 (20mV/Div) VOUT2 (20mV/Div) VOUT1 = 1.8V, VOUT2 = 2.8V, IOUT1 = IOUT2 = 1mA Time (100μs/Div) Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9032-03 August 2012 VOUT1 = 1.8V, VOUT2 = 2.8V, IOUT1 = IOUT2 = 10mA Time (100μs/Div) is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9032 Line Transient Response VIN 4.8 (V) Line Transient Response VIN 4.8 (V) 3.8 3.8 VOUT1 (20mV/Div) VOUT1 (10mV/Div) VOUT2 (20mV/Div) VOUT2 (10mV/Div) VOUT1 = 1.8V, VOUT2 = 2.8V, IOUT1 = IOUT2 = 50mA VOUT1 = 1.8V, VOUT2 = 2.8V, IOUT1 = IOUT2 = 100mA Time (100μs/Div) Time (100μs/Div) Load Transient Response Load Transient Response VIN = 4.3V, VOUT1 = 1.8V, VOUT2 = 2.8V VIN = 4.3V, VOUT1 = 1.8V, VOUT2 = 2.8V IOUT (50mA/Div) IOUT (100mA/Div) VOUT1 (20mV/Div) VOUT1 (20mV/Div) VOUT2 (20mV/Div) VOUT2 (20mV/Div) IOUT1 = IOUT2 = 10mA to 100mA IOUT1 = IOUT2 = 10mA to 50mA Time (250μs/Div) Time (250μs/Div) Power On from EN Power Off from EN VIN = 5V, VOUT1 = 1.8V, VOUT2 = 2.8V, IOUT1 = IOUT2 = 50mA EN (5V/Div) EN (5V/Div) VOUT1 (1V/Div) VOUT1 (1V/Div) VOUT2 (1V/Div) VOUT2 (1V/Div) Time (25μs/Div) Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 VIN = 5V, VOUT1 = 1.8V, VOUT2 = 2.8V, IOUT1 = IOUT2 = 50mA Time (25μs/Div) is a registered trademark of Richtek Technology Corporation. DS9032-03 August 2012 RT9032 Noise Noise VIN = VEN = 5V, IOUT = 50mA VIN = VEN = 5V, No Load VOUT (100uV/Div) VOUT (100uV/Div) Time (10ms/Div) VOUT1 PSRR 10 0 0 -10 -10 -20 -20 -30 IOUT = 10mA -40 IOUT = 150mA -50 -60 -30 -40 -80 -80 -100 10 100 1000 10000 100000 Frequency (Hz) Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9032-03 August 2012 1000000 IOUT = 150mA -60 -70 VIN = VEN = 4.3V ±50mV, VOUT = 1.8V, IOUT = 50mA IOUT = 10mA -50 -70 -90 VOUT2 PSRR 10 PSRR (dB) PSRR(dB) Time (10ms/Div) -90 VIN = VEN = 4.3V ±50mV, VOUT = 2.8V, IOUT = 50mA -100 10 100 1000 10000 100000 1000000 Frequency (Hz) is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9032 Application Information Like any low-dropout regulator, the external capacitors used with the RT9032 must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1μF on the RT9032 input and the amount of capacitance can be increased without limit. The input capacitor must be located at a distance of not more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. Any good quality ceramic or tantalum can be used for this capacitor. The capacitor with larger value and lower ESR (equivalent series resistance) provides better PSRR and line-transient response. EN The output capacitor must meet both requirements for minimum amount of capacitance and ESR in all LDOs application. The RT9032 is designed specifically to work with low ESR ceramic output capacitor for space-saving and performance consideration. Using a ceramic capacitor whose value is at least 1μF with ESR is > 20mΩ on the RT9032 output ensures stability. The RT9032 still works well with output capacitor of other types due to the wide stable ESR range. Figure 1 shows the curves of allowable ESR range as a function of load current for various output capacitor values. Output capacitor of larger capacitance can reduce noise and improve load transient response, stability, and PSRR. The output capacitor should be located at not more than 0.5 inch from the output pin of the RT9032 and returned to a clean analog ground. The output voltage setting can be achieved by the preset of P1 and P2 states before VIN power on. However, if the P1 and P2 states are changed at the condition that only one of the EN pin is turned off-on, the VOUT1 and VOUT2 voltages will not be changed. The output voltage can be reset by turning off-on the input power (VIN) or both of EN pins (EN1 = EN2). Region of Stable COUT ESR(Ω) 100 The RT9032 goes into shutdown mode when the EN pin is in a logic low condition. During this condition, the pass transistor, error amplifier, and band gap are turned off, reducing the supply current to be lower than 1uA. The EN pin can be directly tied to VIN to keep the part on. Programmable Output Voltage Setting There are nine sets of the VOUT1 and VOUT2 output voltages that can be achieved by setting three states (high/ low/open) at the P1 and P2 pins. For the output voltage setting please refer to the “Table for Programmable Output Voltage Setting” in page 2. Current Limit The RT9032 contains an independent current limiter, which monitors and controls the pass transistor’ s gate voltage, limiting the output current to 430mA (typ.). The output can be shorted to ground indefinitely without damaging the part. Thermal Shutdown Protection 10 Unstable Range 1 Stable Range 0.1 0.01 Thermal Considerations Unstable Range VIN = 5V, CIN = COUT1 = COUT1 = 1μF/X7R 0.001 0 50 100 150 200 250 As the die temperature is >170°C, the chip will enter protection mode. The power MOSFET will be turned-off during the protection mode to prevent abnormal operation. 300 For continuous operation, do not exceed absolute maximum operation junction temperature. The power dissipation definition in device is : PD = (VIN − VOUT) x IOUT + VIN x IQ Load Current(mA) Figure 1 Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 is a registered trademark of Richtek Technology Corporation. DS9032-03 August 2012 RT9032 The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : Layout Considerations Careful PCB Layout is necessary for better performance. The following guidelines should be followed for good PCB layout. ` Place the input and output capacitors as close as possible PD(MAX) = (TJ(MAX) − TA) /θJA to the IC. For recommended operating conditions specification, the maximum junction temperature is 125°C. The junction to ambient thermal resistance (θJA is layout dependent) for WDFN-8L 2x2 is 165°C/W and WQFN-8L 1.6x1.6 (COL) is 175°C/W on the standard JEDEC 51-3 single-layer thermal test board. The maximum power dissipation at TA = 25°C can be calculated by following formula : ` Keep VIN, VOUT1 and VOUT2 traces as possible as short and wide. ` Connect GND pin and Exposed Pad to a large PCB ground plane for maximum thermal dissipation. COUT1 & COUT2 should be placed as close as possible to VOUT pin for good filtering. CIN should be placed as close as possible to VIN pin for good filtering. CIN VIN EN1 P2 P1 PD(MAX) = (125°C − 25°C) / (165°C/W) = 0.606W for 1 2 3 8 GND Where T J(MAX) is the maximum operation junction temperature, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. 7 6 9 4 5 COUT1 VOUT1 VOUT2 GND EN2 COUT2 WDFN-8L 2x2 packages The exposed pad should be connected to a strong ground plane for heat sinking and noise reduction. PD(MAX) = (125°C − 25°C) / (175°C/W) = 0.571W for WQFN-8L 1.6x1.6 (COL) packages The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. The Figure 2 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. 0.7 Single Layer PCB WDFN-8L 2x2 Figure 3. Layout Considerations for WDFN-8L 2x2 Packages COUT1 Power Dissipation (W) 0.6 VOUT1 CIN 0.5 VIN 1 EN1 2 EN2 3 WQFN-8L 1.6x1.6 0.4 8 7 6 5 4 P1 0.3 COUT1 & COUT2 should be placed as close as possible to output pin for good filtering. CIN should be placed as close as possible to VIN pin for good filtering. VOUT2 P2 GND COUT2 GND 0.2 Figure 4. Layout Considerations for WQFN-8L 1.6x1.6 (COL) Packages 0.1 0 0 15 30 45 60 75 90 105 120 135 Ambient Temperature (°C) Figure 2. Derating Curve of Maximum Power Dissipation Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9032-03 August 2012 is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT9032 Outline Dimension D2 D L E E2 1 e SEE DETAIL A b 2 1 2 1 A A1 A3 DETAIL A Pin #1 ID and Tie Bar Mark Options Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.700 0.800 0.028 0.031 A1 0.000 0.050 0.000 0.002 A3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 D 1.950 2.050 0.077 0.081 D2 1.000 1.250 0.039 0.049 E 1.950 2.050 0.077 0.081 E2 0.400 0.650 0.016 0.026 e L 0.500 0.300 0.020 0.400 0.012 0.016 W-Type 8L DFN 2x2 Package Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 is a registered trademark of Richtek Technology Corporation. DS9032-03 August 2012 RT9032 2 1 2 1 DETAIL A Pin #1 ID and Tie Bar Mark Options Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.700 0.800 0.028 0.031 A1 0.000 0.050 0.000 0.002 A3 0.175 0.250 0.007 0.010 b 0.150 0.250 0.006 0.010 D 1.550 1.650 0.061 0.065 E 1.550 1.650 0.061 0.065 e L 0.400 0.350 0.016 0.450 0.014 0.018 W-Type 8L QFN 1.6x1.6 (COL) Package Richtek Technology Corporation 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries. DS9032-03 August 2012 www.richtek.com 13