Features • • • • • • • • • • Dual Mode Low Drop Out Voltage Regulator 2.8V Fixed Output Voltage 3V to 5.5V Supply Operation 160 mA Maximum Load Current in Full Power Mode Maximum Current Consumption 61 µA in Full Power Mode and 12 µA in Low Power Mode Power-down Mode Consumption Less Than 1 µA More Than 70dB (Typical) PSRR at 1 KHz 70 µVRMS Output Noise 0.35 µm CMOS Technology Typical Application: Baseband Memory Section Supply in Mobile Terminals Description RE024 is a dual mode Low Drop Out (LDO) voltage regulator macrocell with a fixed 2.8V output voltage, rated for loads up to 160 mA in full power mode and 5 mA in low power mode. (Both modes can be selected by the LP2 signal.) It is designed to be integrated with other analog cells, digital logic, microcontrollers, DSP cores and memory blocks into system-on-chip products. The circuit consists of a PMOS pass device, an error amplifier and a feedback resistive network, sized to achieve the required closed loop gain. These blocks make up the regulating loop. An over-current and short circuit protection circuit has been included to limit the output current delivered by the regulator, thus avoiding destruction in case of a short circuit. An external reference voltage VBG (bandgap voltage) is necessary for correct functionality. The target reference voltage is 1.231V delivered, for example, by BG019. Double pads on the supply voltage VBAT2C/VBAT2CC and output voltage VMEMA/VMEMAA are used to reduce the total output resistance. Current reference is generated inside the cell through a circuit supplied by a 2.5V ± 0.1V of regulated input voltage on V SAUVC. Remote sense terminal VMEMS provides regulation of the load by connecting it to the output terminal near a critical point to improve performance of the regulator (e.g., connecting it to the package pin by double-bonding, thus avoiding the bonding resistance influence). A ceramic capacitor of 2.2 µF connected from VMEMA/VMEMAA to ground is needed as external compensation. Embedded ASIC Macrocell: Power Management for Mobile Terminals (PM) RE024 2.8V 160 mA Dual Mode LDO Regulator A low-leakage current switch has been added to charge a second external capacitor (2.2 µF - 10 µF) to VMEMA/VMEMAA. This voltage, called VBACKUP, is used to guarantee 30 minutes of operation time for the internal system clock and calendar in backup mode when the main battery is unplugged. Figure 1. Symbol (1) VBAT2C VSAUVC VBG VBAT2CC VMEMA ON2 LP2 BACKUPON VMEMAA VMEMS VBACKUP VMEMC Note: GND2 VBACKUPC 1. Pin names are written as they appear on the user screen when the symbol is opened in the design tool environment. Rev. 2703B-PMGMT–02/03 1 Functional Diagram Figure 2. Functional Diagram V BAT2C V BAT2CC ON2 LP2 V BG ON2 LP2 ON2 V BG ON2 GND2 VMEMC GND2 VMEMA VMEMAA BACKUPON VBACKUP ON2 LP2 Current Sensing and Limiting VBACKUPC VMEMS GND2 R11 R12 R21 R22 V SAUVC ON2 IBIAS ON2, LP2 GND2 GND2 Pin Description Pin Name I/O Type Function Value VBAT2C Power Supply External Pad Power Supply 3V to 5.5V VBAT2CC Power Supply External Pad Power Supply 3V to 5.5V VMEMA Analog Output External Pad Output Voltage 2.75V to 2.9 VMEMAA Analog Output External Pad Output Voltage 2.75V to 2.9V VMEMS Analog Input External Pad Sense Voltage 2.75V to 2.9V VMEMC Analog Output Internal Pin Output Voltage 2.75V to 2.9V VBACKUP Analog Input External Pad Backup Voltage 2.75V to 2.9V VBACKUPC Analog Output Internal Pin Internal Backup Voltage 2.75V to 2.9V GND2 Analog Ground Internal Pin Ground 0 VSAUVC Positive Power Supply Internal Pin Power Supply 2.5V ± 0.1V VBG Analog Input Internal Pin Voltage Reference 1.231V ON2 Digital Input Internal Pin Enable Command 0V or VBAT2C/VBAT2CC LP2 Digital Input Internal Pin Low Power Mode Command 0V or VBAT2C/VBAT2CC BACKUPON Digital Input Internal Pin Backup Mode Command 0V or VBAT2C/VBAT2CC 2 RE024 2.8V 160 mA Dual Mode LDO Regulator 2703B–PMGMT–02/03 RE024 2.8V 160 mA Dual Mode LDO Regulator Absolute Maximum Ratings* Analog Signals ....................................... -0.3V to 6.5V *NOTICE: Digital Signals......................................... -0.3V to 5.5V Output Current...................................Internally limited Junction Temperature ..........................-20°C to 150°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Specifications(1) TJ = -20°C to 125°C, VBAT2C/VBAT3CC = 3V to 5.5V unless otherwise specified, output capacitance = 2.2 µF. Table 1. Electrical Characteristics Symbol Parameter Condition Min VBAT2C/VBAT2CC Operating Supply Voltage 3 VSAUVC Auxiliary Operating Supply Voltage 2.4 TJ Temperature Range Typ Max Unit 5.5 V 2.6 V -20 125 °C 2.75 2.85 V 160 mA 51 61 µA 2.5 Full Power Mode VMEMA/VMEMAA Output Voltage IMEMA/IMEMAA Output Current IQQ Quiescent Current ∆VDC Line Regulation IMEMA/IMEMAA = 160 mA 4 7 mV ∆VTRAN Transient Line Regulation IMEMA/IMEMAA = 160 mA rise time = fall time = 5 µs 18 33 mV ∆VDC Load Regulation 10% - 90% of max IMEMA/IMEMAA 3 10 mV ∆VTRAN Transient Load Regulation 10% - 90% of max IMEMA/IMEMAA rise time = fall time = 5 µs 25 66 mV 43 VBAT2C/ VBAT2CC = 3V PSRR (2) Power Supply Rejection Ratio at Full Load VBAT2C/ VBAT2CC = 4.25V VBAT2C/ VBAT2CC = 5.5V VN Output Noise(3) @100 Hz -30 dB @1 kHz -30 dB @20 kHz -27 dB @100 kHz -20 dB @100 Hz -70 dB @1 kHz -70 dB @20 kHz -47 dB @100 kHz -32 dB @100 Hz -70 dB @1 kHz -65 dB @20 kHz -47 dB @100 kHz -30 dB Bandwidth = 10 Hz to 100 kHz 70 118 µVRMS 3 2703B–PMGMT–02/03 Table 1. Electrical Characteristics (Continued) Symbol Parameter Condition Min TR Rise Time Full Load 10% - 90% of VMEMA/VMEMAA ISD Shut Down Current ICC Short-circuit Current Threshold Typ Max Unit 200 µs 1 µA 450 mA 2.9 V 5 mA 10.5 12 µA Low Power Mode VMEMA/VMEMAA Output Voltage 2.72 IMEMA/IMEMAA Output Current IQQ Quiescent Current ∆VDC Line Regulation VBAT2C/VBAT2CC = 3.4V to 3.V IMEMA/IMEMAA = 2 mA 2 3 mV ∆VTRAN Transient Line Regulation VBAT2C/VBAT2CC = 3.4V to 3V IMEMA/IMEMAA = 2 mA rise time = fall time = 5 µs 2 4 mV ∆VDC Load Regulation 10% - 90% of max IMEMA/IMEMAA 2 5 mV ∆VTRAN Transient Load Regulation 10% - 90% of max IMEMA/IMEMAA rise time = fall time = 5 µs 2 6 mV 9 VBAT2C/ VBAT2CC = 3V PSRR(2) Power Supply Rejection Ratio at Full Load VBAT2C/ VBAT2CC = 4.25V VBAT2C/ VBAT2CC = 5.5V @100 Hz -40 dB @1 kHz -40 dB @20 kHz -35 dB @100 kHz -35 dB @100 Hz -70 dB @1 kHz -65 dB @20 kHz -47 dB @100 kHz -30 dB @100 Hz -55 dB @1 kHz -55 dB @20 kHz -46 dB @100 kHz -35 dB VN Output Noise(3) Bandwidth = 10 Hz to 100 kHz TR Rise Time Full Load 10% - 90% of VMEMA/VMEMAA ISD Shut Down Current ICC Notes: 4 204 Short-circuit Current Threshold 300 µ VRMS 500 µs 1 µA 240 mA 1. Obtained by considering the parasitics of a TFBGA100 Package. 2. This parameter shows the immunization of the circuit taking into account a voltage ripple on battery voltage for different frequencies shown. 3. Obtained by using BG019 as reference voltage generator. RE024 2.8V 160 mA Dual Mode LDO Regulator 2703B–PMGMT–02/03 RE024 2.8V 160 mA Dual Mode LDO Regulator Control Modes All digital signals are referred to the supply voltage VBAT. Table 2. Truth Table ON2 LP2 VMEMA/VMEMAA 0 X Power down (High-Z) 1 0 Power on, Full Power Mode VMEMA/VMEMAA = 2.8V 1 1 Power on, Low Power Mode VMEMA/VMEMAA = 2.8V Table 3. Backupon Truth Table Application Example BACKUPON VBACKUP 0 Backup Mode 1 Backup Switch Closed VBACKUP = VMEMA/VMEMAA A ceramic capacitor of 2.2 µF with ESR between 20 mΩ and 250 mΩ connected from VMEMA/VMEMAA to ground is needed for external compensation. A ceramic capacitor with a value between 2.2 µF and 10µF connected between VBACKUP and Ground is used as backup supply. Description Min Typ Max Units Capacitor (CL) 1.8 2.2 2.6 µF Backup Battery (CBCK) 2.2 10 µF Figure 3. Application Example 2.5V Regulator (e.g., RE031) 2.5V VSAUVC VBAT2C VBAT2CC 1.231V Bandgap (e.g., BG019) VBG Battery Pack VMEMA VMEMAA Digital Core VMEMS ON6 LP2 BACKUPON CL VBACKUP VMEMC GND2 VBACKUPC CBCK 5 2703B–PMGMT–02/03 Typical Performance Characteristics (Conditions specified on page 10) Note. In these graphs: – Output Voltage refers to VMEMA/VMEMAA – Battery Voltage refers to VBAT2C/VBAT2CC – Output Current refers to IMEMA/IMEMAA S ta tic L o a d R e g u la tio n in F u ll P o w e r M o d e Static Line Regulation at Full Load in Full Power Mode 2 O u tp u t V o lta g e C h a n g e [m V ] Output Voltage Change [mV] 5 4 3 2 1 0 V B A T = 3V 0 -2 V B A T = 5.5V -4 -6 -8 -10 V B A T = 4,25V -12 -14 3 3.5 4 4.5 5 5.5 0 20 40 60 80 100 120 140 160 O u tp u t C u rre n t [m A ] Battery Voltage [V] : T ra n sie n t L o a d R e g u la tio n in F u ll P o w e r M o d e Transient Line Regulation at Full Load in Full Power Mode 2.800 2.805 2.795 2.800 O u tp u t V o lta g e [V ] Output Voltage [V] V B A T = 3V 2.790 2.785 2.780 2.795 2.790 2.780 2.775 2.775 2.770 0.35 0.4 0.45 Time [ms] 0.5 0.55 V B A T = 4,25V 2.785 V B A T = 5,5V 2.770 0.35 0.4 0.45 0.5 0.55 T im e [m s] 6 RE024 2.8V 160 mA Dual Mode LDO Regulator 2703B–PMGMT–02/03 RE024 2.8V 160 mA Dual Mode LDO Regulator Typical Performance Characteristics (Conditions specified on page 10) P o w e r S u p p ly R e je ctio n R a tio a t F u ll L o a d P o w e r S u p p ly Re je ctio n Ra tio a t F u ll L o a d in F u ll P o w e r M o d e V e rsu s Ba tte ry V o lta g e in F u ll P o w e r M o d e 10 100 1000 10000 100000 -10 -20 -20 -30 -30 Freq = 20K Hz Freq = 100K Hz -40 -40 -50 V BA V BA T T = 4,25V P S R R [d B] P S R R [d B ] -10 V B A T = 5,5V = 3V -60 -50 -60 -70 -80 -70 -90 -80 Freq = 100Hz F re q u e n cy [H z ] Ba tte ry V o lta g e [V ] S ta rtu p a t F u ll L o a d fo r V B AT = 4.25V O u tp u t N o ise S p e ctru m a t F u ll L o a d a n d V B AT = 4.25V in F u ll P o w e r M o d e in F u ll P o w e r M o d e 1.0E -11 5 O N2 4.5 O u tp u t N o ise [V ^ 2/H z ] 4 3.5 V o lta g e [V ] Freq = 1K Hz -100 V ME M 3 2.5 2 1.5 1 Total output nois e 70 µV R MS 1.0E -12 1.0E -13 0.5 1.0E -14 0 0 20 40 60 T im e [µs] 80 100 10 100 1000 10000 100000 F re q u e n cy [H z ] 7 2703B–PMGMT–02/03 Typical Performance Characteristics (Conditions specified on page 10) Static Line Regulation at Full Load in Low Power Mode S ta tic L o a d Re g ula tio n in Lo w P o w e r M o d e 6 1.5 O u tp ut V o lta g e Ch a n g e [m V ] Output Voltage Change [mV] 5 1.0 0.5 0.0 -0.5 -1.0 4 V B A T = 5,5V 3 2 1 V B A T = 4 ,25V 0 -1 -2 -3 V B A T = 3V -4 -1.5 3 3.5 4 4.5 5 5.5 -5 0 1 2 Battery Voltage [V] 3 4 5 O u tp ut Cu rre n t [m A] Tr a n s ie n t Lo a d R e g u la tio n in Lo w Po w e r M o d e Transient Line Regulation at Full Load in Low Power Mode 2.8 02 2.800 V B A T = 5,5V 2.8 01 O u tp u t Vo lta g e [V] Output Voltage [V] 2.799 2.798 2.797 2.796 V B A T = 4,25V 2.7 99 2.7 98 2.7 97 V B A T = 3V 2.7 96 2.795 0.35 2.7 95 0.4 0.45 Time [ms] 8 2.8 00 0.5 0.55 0.3 5 0.4 0.4 5 0.5 0.5 5 Tim e [ m s ] RE024 2.8V 160 mA Dual Mode LDO Regulator 2703B–PMGMT–02/03 RE024 2.8V 160 mA Dual Mode LDO Regulator Typical Performance Characteristics (Conditions specified on page 10) P o w e r S u p p l y R e j e ctio n Ra tio a t F u ll L o a d P o w e r S u p p ly R e je ctio n R a tio a t F u ll L o a d V e rsu s in Low P ow e r M ode B a tte ry V o lta g e in L o w P o w e r M o d e 10 100 1000 10000 100000 3.0 -30 3.5 4.0 4.5 5.0 5.5 -20 -30 -40 V B A T = 4,25V -50 P S R R [d B ] P S R R [d B] -40 V B A T = 3V -60 -50 -60 Freq = 100 K Hz -70 Freq = 20 K Hz -80 V B A T = 5,5V Freq = 1 K Hz -90 -70 Freq = 100 Hz -100 F re q u e n c y [H z ] B a tte ry V o lta g e [V ] S ta rtu p a t F u ll L o a d fo r V B AT = 4.25V O u tp u t N o ise S p e ctru m a t F u ll L o a d a n d V B AT = 4.25V in L o w P o w e r M o d e in L o w P o w e r M o d e 5 1.0E -09 O N2 4.5 O u tp u t N o ise [V ^ 2/H z ] 4 V o lta g e [V ] 3.5 V ME M 3 2.5 2 1.5 1 Total O utput Nois e 204µV R MS 1.0E -10 1.0E -11 1.0E -12 0.5 1.0E -13 0 0 25 50 75 T im e [µs] 100 125 150 10 100 1000 10000 100000 F re q u e n cy [H z ] 9 2703B–PMGMT–02/03 Terminology Line Regulation Measures the maximum transient and DC variations of the output voltage of the RE024 when the supply changes between two specified values with fixed load current; minimum rise time and fall time is 5 µs. Figure 4. Line Regulation 3.4V VBAT2C/VBAT2CC 3V 5 µs 5 µs VMEMA/VMEMAA ∆VTRAN ∆VDC Load Regulation Measures the maximum transient and DC variations of the output voltage of the RE024 when the load current changes between two specified values with fixed power supply; minimum rise time and fall time is 5 µs. Figure 5. Load Regulation 90% of max IMEMA/IMEMAA IMEMA/IMEMAA 10% of max IMEMA/IMEMAA VMEMA/VMEMAA 10 ∆VTRAN 5 µs 5 µs ∆VDC RE024 2.8V 160 mA Dual Mode LDO Regulator 2703B–PMGMT–02/03 Atmel Headquarters Atmel Operations Corporate Headquarters Memory 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL (81) 3-3523-3551 FAX (81) 3-3523-7581 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL (33) 2-40-18-18-18 FAX (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards 1150 East Cheyenne Mtn. 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