Features • • • • • • • • • • Dual Mode Low Drop Out Voltage Regulator 1.8V Fixed Output Voltage 3V to 5.5V Supply Operation 80 mA Maximum Load Current in Full Power Mode Maximum Current Consumption 36 µA in Full Power Mode and 14 µA in Low Power Mode Power-down Mode Consumption Less Than 1 µA More Than 70dB (Typical) PSRR at 1 KHz 46 µVRMS Output Noise 0.35 µm CMOS Technology Typical Application: Baseband Memory Section Supply in Mobile Terminals Description RE029 is a dual mode Low Drop Out (LDO) voltage regulator macrocell with a fixed 1.8V output voltage, rated for loads up to 80 mA in full power mode and 5 mA in low power mode. (Both modes can be selected by the LP8 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 VBAT1B/VBAT1BB and output voltage VMLVA/VMLVAA 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 VMLVS 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 VMLVA/VMLVAA to ground is needed as external compensation. Embedded ASIC Macrocell: Power Management for Mobile Terminals (PM) RE029 1.8V 80 mA Dual Mode LDO Regulator Figure 1. Symbol (1) Note: 1. Pin names are written as they appear on the user screen when the symbol is opened in the design tool environment. Rev. 2705B–PMGMT–03/03 1 Functional Diagram Figure 2. Functional Diagram VBAT1B VBAT1BB VBAT1C ON8 LP8 V BG ON8 LP8 ON8 V BG ON8 GND1 VMLVC GND1 VMLVA VMLVAA ON8 LP8 Current Sensing and Limiting VMLVS R1 GND1 V SAUVC R2 ON8 IBIAS ON8, LP8 GND1 GND1 Pin Description Pin Name I/O Type Function Value VBAT1B Power Supply External Pad Power Supply 3V to 5.5V VBAT1BB Power Supply External Pad Power Supply 3V to 5.5V VMLVA Analog Output External Pad Output Voltage 1.7V to 1.9V VMLVAA Analog Output External Pad Output Voltage 1.7V to 1.9V VMLVS Analog Input External Pad Sense Voltage 1.7V to 1.9V VMLVC Analog Output Internal Pin Output Voltage 1.7V to 1.9V VBAT1C Auxiliary Power Supply Internal Pin Power Supply 3V to 5.5V GND1 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 ON8 Digital Input Internal Pin Enable Command 0V or VBAT1B/VBAT1BB LP8 Digital Input Internal Pin Low Power Mode Command 0V or VBAT1B/VBAT1BB 2 RE029 1.8V Dual Mode LDO Regulator 2705B–PMGMT–03/03 RE029 1.8V 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, VBAT1B/VBAT1BB = 3V to 5.5V unless otherwise specified, output capacitance = 2.2 µF. Table 1. Electrical Characteristics Symbol Parameter Condition Min VBAT1B/VBAT1BB 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 1.72 1.87 V 80 mA 30 36 µA 2.5 Full Power Mode VMLVA/VMLVAA Output Voltage IMLVA/IMLVAA Output Current IQQ Quiescent Current ∆VDC Line Regulation IMLVA/IMLVAA = 80 mA 2 3 mV ∆VTRAN Transient Line Regulation IMLVA/IMLVAA = 80 mA rise time = fall time = 5 µs 2 3 mV ∆VDC Load Regulation 10% - 90% of max IMLVA/IMLVAA; 2 4.2 mV ∆VTRAN Transient Load Regulation 10% - 90% of max IMLVA/IMLVAA; rise time = fall time = 5 µs 5 23 mV 25 VBAT1B/ VBAT1BB = 3V PSRR(2) Power Supply Rejection Ratio at Full Load VBAT1B/ VBAT1BB = 4.25V VBAT1B/ VBAT1BB = 5.5V VN Output Noise(3) @100 Hz -75 dB @1 kHz -75 dB @20 kHz -55 dB @100 kHz -35 dB @100 Hz -70 dB @1 kHz -70 dB @20 kHz -60 dB @100 kHz -35 dB @100 Hz -65 dB @1 kHz -65 dB @20 kHz -55 dB @100 kHz -35 dB Bandwidth = 10 Hz to 100 kHz 46 80 µVRMS 3 2705B–PMGMT–03/03 Table 1. Electrical Characteristics (Continued) Symbol Parameter Condition Min TR Rise Time Full Load 10% - 90% of VMLVA/VMLVAA ISD Shut Down Current ICC Short-circuit Current Threshold Typ Max Unit 130 µs 1 µA 130 mA 1.9 V 5 mA 11.5 13.75 µA Low Power Mode VMLVA/VMLVAA Output Voltage 1.7 IMLVA/IMLVAA Output Current IQQ Quiescent Current ∆VDC Line Regulation IMLVA/IMLVAA = 5 mA 2 3 mV ∆VTRAN Transient Line Regulation IMLVA/IMLVAA = 5 mA rise time = fall time = 5 µs 2 3 mV ∆VDC Load Regulation 10% - 90% of max IMLVA/IMLVAA 2 5 mV ∆VTRAN Transient Load Regulation 10% - 90% of max IMLVA/IMLVAA; rise time = fall time = 5 µs 5 8 mV 9.75 VBAT1B/ VBAT1BB = 3V PSRR(2) Power Supply Rejection Ratio at Full Load VBAT1B/ VBAT1BB = 4.25V VBAT1B/ VBAT1BB = 5.5V (3) @100 Hz -70 dB @1 kHz -70 dB @20 kHz -65 dB @100 kHz -35 dB @100 Hz -65 dB @1 kHz -65 dB @20 kHz -55 dB @100 kHz -35 dB @100 Hz -45 dB @1 kHz -45 dB @20 kHz -45 dB @100 kHz -40 dB VN Output Noise Bandwidth = 10 Hz to 100 kHz TR Rise Time Full Load 10% - 90% of VMLVA/VMLVAA ISD Shut Down Current Notes: 4 90 170 µVRMS 170 µs 1 µA 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. RE029 1.8V Dual Mode LDO Regulator 2705B–PMGMT–03/03 RE029 1.8V Dual Mode LDO Regulator Control Modes All digital signals are referred to the supply voltage VBAT1B, VBAT1BB. Table 2. Truth Table Application Example ON8 LP8 VMLVA/VMLVAA 0 X Power down (High-Z) 1 0 Power on, Full Power Mode VMLVA/VMLVAA = 1.8V 1 1 Power on, Low Power Mode VMLVA/VMLVAA = 1.8V A ceramic capacitor (CL) of 2.2 µF with ESR between 20 mΩ and 250 mΩ connected from VMLVA/VMLVAA to ground is needed for external compensation. Description Min Typ Max Units Capacitor (CL) 1.8 2.2 2.6 µF Figure 3. Application Example 2.5V Regulator (e.g., RE031) 2.5V VSAUVC VBAT1B VBAT1BB 1.231V Bandgap (e.g., BG019) VBG Battery Pack VMLVA VMLVAA Digital Core VMLVS ON8 LP8 CL VMLVC VBAT1C GND1 5 2705B–PMGMT–03/03 Typical Performance Characteristics (Conditions specified on page 10) Note. In these graphs: – Output Voltage (VMLV) refers to VMLVA/VMLVAA – Battery Voltage (VBAT) refers to VBAT1B/VBAT1BB – Output Current (IMLV) refers to IMLVA/IMLVAA Static Line Regulation at Full Load in Full Power Mode S ta tic L o a d Re g u la tio n in F u ll P o w e r M o d e 2.5 2.0 O u tp u t V o lta g e C h a n g e [m V ] Output Voltage Change [mV] 0.8 0.6 0.4 0.2 1.5 1.0 V BA T = 3V 0.5 V BA T = 5.5V 0.0 V BA T = 4.25V -0.5 -1.0 -1.5 -2.0 0.0 3 3.5 4 4.5 5 0 5.5 20 60 5.000 2.000 4.000 1.500 1.000 0.500 0.000 -0.500 -1.000 -1.500 3.000 2.000 1.000 0.000 -1.000 -2.000 V B AT = 4.25V V B AT = 3V -3.000 V B AT = 5.5V -4.000 -2.000 0.35 80 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 2.500 O u tp u t V o lta g e C h a n g e [V ] Output Voltage Change [mV] Transient Line Regulation at Full Load in Full Power Mode -5.000 0.4 0.45 0.5 0.55 0.35 0.4 Time [ms] 6 40 O u tp u t C u rre n t [m A ] Battery Voltage [V] 0.45 0.5 0.55 T im e [m s] RE029 1.8V Dual Mode LDO Regulator 2705B–PMGMT–03/03 RE029 1.8V 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 Ra 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 3.0 -10 3.5 4.0 4.5 5.0 5.5 -30 -20 -40 V BA T = 5.5V -30 V BA T = 4.25V Freq = 100K Hz Freq = 20K Hz -50 -50 P S RR [d B] P S RR [d B] -40 V BA T = 3V -60 -70 -60 Freq = 1K Hz -70 -80 -80 -90 -90 Freq = 100Hz -100 -100 -110 -110 F re q [Hz ] Ba tte ry V o lta g e [V ] L D O 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 5 1.0E -11 O u tp u t N o ise [V /sq rt(H z )] O N8 4.5 4 V o lta g e [V ] 3.5 3 2.5 V MLV 2 1.5 1 Total output nois e 46 µ V R MS 1.0E -12 1.0E -13 1.0E -14 0.5 1.0E -15 0 0 50 100 T im e [ µ s] 150 200 10 100 1000 10000 100000 F re q [H z ] 7 2705B–PMGMT–03/03 Typical Performance Characteristics (Conditions specified on page 10) S ta tic L o a d Re g u la tio n in L o w P o w e r M o d e 6 4.5 5 O u tp u t V o lta g e C h a n g e [m V ] Output Voltage Change [mV] Static Line Regulation at Full Load in Low Power Mode 5.0 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 V BA T = 5.5V 4 3 2 V BA T = 4.25V 1 0 -1 -2 -3 V BA T = 3V -4 -5 0.0 -6 3 3.5 4 4.5 5 5.5 0 1 2 Battery Voltage [V] Transient Line Regulation at Full Load in Low Power Mode O u t p u t V o lta g e C h a n g e [m V ] Output Voltage Change [mV] 5 1.000 0.500 0.000 -0.500 -1.000 V BAT = 5.5V 5 .5 0 0 4 .5 0 0 3 .5 0 0 V BAT = 4.25V 2 .5 0 0 V BAT = 3V 1 .5 0 0 0 .5 0 0 -0 .5 0 0 0.4 0.45 0.5 0.55 0 .3 5 0 .4 Time [ms] 8 4 Tr a n s ie n t Lo a d R e g u la tio n in Lo w P o w e r M o d e 1.500 -1.500 0.35 3 O u tp u t C u rre n t [m A ] 0 .4 5 0 .5 0 .5 5 Tim e [ m s ] RE029 1.8V Dual Mode LDO Regulator 2705B–PMGMT–03/03 RE029 1.8V 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 R e je ctio n R a tio a t F u ll L o a d in L o w P o w e r M o d e V e rsu s 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 3.0 100000 -40 V B A T = 5.5V V B A T = 4.25V P S R R [d B ] P S R R [d B ] 4.5 5.0 5.5 -40 -60 -70 -50 F req = 1K Hz -60 F req = 100K Hz -70 F req = 20K Hz -80 -80 F req = 100Hz V B A T = 3V -90 -100 -100 F re q [H z ] B a tte ry V o lta g e [V ] L D O 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 -10 O N8 4.5 O u tp u t N o ise [V /sq rt(H z )] 4 3.5 V o lta g e [V ] 4.0 -30 -50 -90 3.5 -20 -30 3 2.5 V MLV 2 1.5 1 Total output nois e 89 µ V R MS 1.0E -11 1.0E -12 1.0E -13 0.5 1.0E -14 0 0 25 50 75 T im e [ µ s] 100 125 150 10 100 1000 10000 10000 F re q [H z ] 9 2705B–PMGMT–03/03 Terminology Line Regulation Measures the maximum transient and DC variations of the output voltage of the RE029 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 VBAT1B/VBAT1BB 3V 5 µs 5 µs VMLVA/VMLVAA ∆VTRAN ∆VDC Load Regulation Measures the maximum transient and DC variations of the output voltage of the RE029 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 IMLVA/IMLVAA IMLVA/IMLVAA 10% of max IMLVA/IMLVAA 5 µs 5 µs ∆VTRAN VMLVA/VMLVAA ∆VDC 10 RE029 1.8V Dual Mode LDO Regulator 2705B–PMGMT–03/03 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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