Features • • • • • • • • • • Low-noise Low Drop Out Voltage Regulator 2.6V Fixed Output Voltage 3V to 5.5V Supply Operation 160 mA Maximum Load Current Less Than 46 µA (max) Quiescent Current Power-down Mode Consumption Less Than 1 µA More Than 60 dB (Typical) PSRR at 1 kHz 68µ VRMS Output Noise 0.35 µm CMOS Technology Typical Application: Baseband Section Supply in Mobile Terminals Description RE023 is a Low Drop Out (LDO) voltage regulator macrocell with a fixed 2.6V output voltage, rated for loads up to 160 mA. It is designed to be integrated with other analog cells, digital logic, microcontrollers, DSP cores and memory blocks into system-onchip 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 (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 V BAT2B/VBAT2BB and output voltage VANINTA/VANINTAA 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 regulated input voltage on V SAUVC. Remote sense terminal VANINTS provides regulation at the load by connecting it to the output terminal near a critical point to improve performance of the regulator (e.g., connecting them at the package pin by double-bonding, thus avoiding the bonding resistance influence). A ceramic capacitor of 2.2 µF connected from VANINTA/VANINTAA to ground is needed as external compensation. Embedded ASIC Macrocell: Power Management for Mobile Terminals (PM) RE023 Fixed 2.6V 160 mA LDO Voltage Regulator Figure 1. Symbol(1) vsauvc vbat2b vbg vbat2bb vaninta vanintaa on1 vanintc Note: vanints gnd2 1. Pin names are written as they appear on the user screen when the symbol is opened in the design tool environment. Rev. 2702B-PMGMT–02/03 1 Functional Diagram Figure 2. Functional Diagram VBAT2BB VBAT2B VSAUVC ON1 ON1 IBIAS VBG ON1 Pass Device VANINTC VANINTA GND2 VANINTAA VANINTS GND2 ON1 Current Sensing and Limiter R1 GND2 R2 ON1 GND2 Pin Description Pin Name I/O Type Function Value VBAT2B Power supply External pad Power supply 3V to 5.5V VBAT2BB Power supply External pad Power supply 3V to 5.5V VANINTA Analog output External pad Output voltage 2.5V to 2.7V VANINTAA Analog output External pad Output voltage 2.5V to 2.7V VANINTS Analog output External pad Sense voltage 2.5V to 2.7V VANINTC Analog output Internal pin Output voltage 2.5V to 2.7V GND2 Ground Internal pin Ground 0 VSAUVC Power supply Internal pin Power supply 2.5V ± 0.1V VBG Analog input Internal pin Voltage reference 1.231V ON1 Digital input Internal pin Enable command 0 or VBAT2B/VBAT2BB 2 RE023 Fixed 2.6V 160mA LDO Voltage Regulator 2702B–PMGMT–02/03 RE023 Fixed 2.6V 160mA LDO Voltage Regulator Absolute Maximum Ratings* VIN .......................................................... -0.3V to 6.5V *NOTICE: Digital Signals......................................... -0.3V to 5.5V Output Current..................................Internally Limited Junction Temperature ..........................-40°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, VBAT2B/VBAT2BB = 3V to 5.5V unless otherwise specified, output capacitance = 2.2 µF. Table 1. Electrical Specifications Symbol Parameter Condition Max Unit VBAT2B/VBAT2BB Operating Supply Voltage 3 5.5 V VSAUVC Auxiliary Operating Supply Voltage 2.4 2.6 V TJ Junction Temperature Range -20 125 °C VANINTA/ VANINTAA Output Voltage 2.5 2.7 V IANINTA/ IANINTAA Output Current 160 mA IQQ Quiescent Current 46 µA ∆VDC Line Regulation IANINTA/IANINTAA = 160 mA 2 3 mV ∆VTRAN Transient Line Regulation IANINTA/IANINTAA = 160 mA rise time = fall time = 5 µs 4 7 mV ∆VDC Load Regulation 10% - 90% of max IANINTA/IANINTAA 2 3 mV ∆VTRAN Transient Load Regulation 10% - 90% of max IANINTA/IANINTAA rise time = fall time = 5 µs 5 10 mV VBAT = 3V PSRR Power Supply Rejection Ratio at Full Load VBAT = 4.25V VBAT = 5.5V Min Typ 2.5 2.6 @100 Hz -65 dB @1 kHz -60 dB @20 kHz -40 dB @100 kHz -30 dB @100 Hz -60 dB @1 kHz -60 dB @20 kHz -50 dB @100 kHz -40 dB @100 Hz -55 dB @1 kHz -55 dB @20 kHz -48 dB @100 kHz -40 dB 3 2702B–PMGMT–02/03 Table 1. Electrical Specifications (Continued) Symbol Parameter Condition (2) Typ Max Unit 68 81 µ VRMS 70 µs VN Output Noise TR Rise Time ISD Shut Down Current 1 µA ICC Short-circuit current 400 mA Notes: 4 Bandwidth: 10 Hz to 100 kHz output current = 160 mA Min 100% of IANINTA/IANINTAA 10% - 90% VANINTA/VANINTAA 1. Obtained by considering the parasitics of a TFBGA100 Package. 2. Obtained by using BG019 as reference voltage generator. RE023 Fixed 2.6V 160mA LDO Voltage Regulator 2702B–PMGMT–02/03 RE023 Fixed 2.6V 160mA LDO Voltage Regulator Control Modes All digital signals are referred to the supply voltage VBAT2B/BAT2BB. Table 2. Truth Table Application Example ON1 VANINTA/VANINTAA 0 Power down (High-Z) 1 Power on, VANINTA/VANINTAA = 2.6V A ceramic capacitor of 2.2 µF with ESR between 20 mΩ and 250 mΩ connected from VANINTA/VANINTAA to ground is needed as 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 VBAT2B VBAT2BB 1.231V Bandgap (e.g., BG019) VBG Battery Pack VANINTA VANINTAA ON1 VANINTS CL Digital Core VANINTC GND2 5 2702B–PMGMT–02/03 Typical Performance Characteristics (Conditions specified on page 8) S ta tic L o a d R e g u la tio n Static Line Regulation at Full Load 15 O u tp u t V o lta g e C h a n g e [m V ] Output Voltage Change [mV] 1 0 -1 -2 -3 10 5 V B AT = 3V -5 -10 3 3.5 4 4.5 5 5.5 0 20 40 60 Battery Voltage [V] 80 100 120 140 160 O u tp u t C u rre n t [m A ] Transient Line Regulation at Full Load T ra n sie n t L o a d R e g u la tio n 2.598 2.600 2.597 2.598 V B A T = 3V O u tp u t V o lta g e [V ] 2.596 Output Voltage [V] V B AT = 5.5V V B AT = 4.25V 0 2.595 2.594 2.593 2.592 2.591 V B A T = 4.25V 2.596 2.594 2.592 2.590 2.590 2.588 2.589 2.588 0.35 2.586 0.4 0.45 Time [ms] 6 V B A T = 5.5V 0.5 0.55 0.35 0.4 0.45 0.5 0.55 T im e [m s] RE023 Fixed 2.6V 160mA LDO Voltage Regulator 2702B–PMGMT–02/03 RE023 Fixed 2.6V 160mA LDO Voltage Regulator Typical Performance Characteristics (Conditions specified on page 8) 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 l y R e j e cti o n Ra ti o a t F u l l L o a d 10 100 1000 10000 ve rsu s B a tte ry V o lta g e 100000 3.0 -30 3.5 4.0 4.5 5.0 5.5 -30 -35 -40 -50 V B A T = 5.5V -45 P S R R [d B ] P S RR [d B] -40 V B A T = 4.25V V B A T = 3V -50 -55 Freq = 1 k Hz -60 Freq = 100 k Hz -70 -60 -80 -65 -90 Freq = 20 k Hz Freq = 100 Hz B a tte ry V o l ta g e [V ] F re q u e n c y [Hz ] 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 5 1.0E -10 4.5 O N1 O u tp u t N o ise [V /sq rt(Hz )] 4 V o lta g e [V ] 3.5 3 V AN IN T 2.5 2 1.5 1 Total output nois e 68 µ V R MS 1.0E -11 1.0E -12 1.0E -13 0.5 0 1.0E -14 0 20 40 60 T im e [ µ s] 80 100 10 100 1000 10000 100000 F re q u e n cy [Hz ] 7 2702B–PMGMT–02/03 Terminology Line Regulation Measures the maximum transient and DC variations of the output voltage of the LDO 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(5.4V) VBAT2B/VBAT2BB 3V(5V) 5 µs 5 µs VANINTA/VANINTAA ∆VTRAN ∆VDC Load Regulation Measures the maximum transient and DC variations of the output voltage of the LDO 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 IANINTA/IANINTAA IANINTA/IANINTAA 10% of max IANINTA/IANINTAA 5 µs 5 µs ∆VTRAN VANINTA/VANINTAA ∆VDC 8 RE023 Fixed 2.6V 160mA LDO Voltage Regulator 2702B–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 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 Microcontrollers Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 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 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 RF/Automotive ASIC/ASSP/Smart Cards 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 1150 East Cheyenne Mtn. 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