LXDC55KAAA-205 Micro DC-DC converter 1. Features Small footprint Buck converter for up to 3A output current application Low EMI noise using an inductor-embedded ferrite substrate Input voltage range : 2.7 to 5.5V User Adjustable Output voltage : 0.8 to 3.6V PWM/PFM mode Powergood function Over current protection, Over temperature protection 2. Mechanical Details Unit:mm Mark Dimension Mark Dimension L 5.0 +/- 0.2 e 1.1 W 5.7 +/- 0.2 f 0.6 T 2.1 MAX g 0.35 a 0.25 h 0.6 b 0.7 i 0.35 c 0.4 j 1.0 d 0.8 1 April 2013 LXDC55KAAA-205 Micro DC-DC converter Pin configuration Pin No. Symbol I/O Description 1 EN Input ON/OFF control pin H: Enable, L: Disable 4,5 Vin Input Power supply voltage Input pin 6,12 GND 7,8 Vout Output Regulated voltage output pin 10 PG Output Power good output pin H: Normal Operation 11 FB Input External resistor connection pin for output voltage setting 2,3,9,13,14 NC - GND pin No connection This pin can be connected to any other pins - 2 April 2013 LXDC55KAAA-205 Micro DC-DC converter 3. Electrical Specification 3-1 Absolute maximum ratings Parameter symbol rating Unit Vin 6 V Maximum EN pin voltage VEN 6 V Maximum FB pin voltage VFB 6 V Maximum PG pin voltage VPG Vin Maximum input voltage V Operating temperature TOP -40 to +85 o Storage temperature TSTO -40 to +85 o C C 3-2 Electrical characteristics (Ta=25℃) Parameter Symbol Condition Min. Typ. Max. Unit Input voltage Vin 2.7 5.5 V Output voltage range Vout 0.8 3.6 V 2.3 V UVLO UVLO Output voltage accuracy Vacc Load current range Iout Over current protection OCP Vin Falling 2.1 hysteresis 2.2 200 PWM mode Auto-recovery mV -2.5 +2.5 % 0 3000 mA 3000 5500 mA Vin=5V, RFB=576ohm, Ripple voltage Vrpl (Vout=3.3V) 20 mV 93 % Iout=1500mA, BW=100MHz Vin=5V, RFB=576ohm, Efficiency EFF T.B.D. (Vout=3.3V) Iout=1500mA, BW=100MHz EN control voltage Power good threshold Power good sink current External output capacitor(*1) VENH ON ; Enable VENL OFF ; Disable 1.0 Vin V 0 0.4 V PGTHH Output voltage rising 95 % PGTHL Output voltage falling 90 % IPG Cout 22 1 mA 150 uF ・(*1) External capacitors (Cout>22uF) shall be placed near the module in order to proper operation. ・The above characteristics are tested using the application circuit on section 4. 3 April 2013 LXDC55KAAA-205 Micro DC-DC converter 3-3 Output Current Thermal Derating (Vin=5.0V) Thermal Derating 3.5 Io[A] 3 2.5 Vo=0.8V 2 Vo=1.2V 1.5 Vo=1.8V 1 Vo=3.3V, 3.6V 0.5 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Ta[℃ ] Note: This thermal derating data is measured on Murata evaluation board and reference only. The temperature of the module depends on PCB design and peripheral components. Please keep the module temperature under 105 oC on your board. 4 April 2013 LXDC55KAAA-205 Micro DC-DC converter 4. Application Circuit Cin : GRM21BB30J106 (10uF/6.3V MLCC) Cout : GRM21BB30J226 (22uF/6.3V MLCC) 5. Reference Land Pattern e f e f e (5) (4) (3) (6) (14) (13) (7) (8) (9) (2) (1) (12) (10) (11) b cb cd c b cb unit (mm) Mark Dimension b 0.7 c 0.4 d 0.8 e 1.1 f 0.6 *Reference purpose only 5 April 2013 LXDC55KAAA-205 Micro DC-DC converter 6. Output Voltage adjustment Output voltage can be adjusted by using a resistor (RFB) between FB pin and GND pin. RFB = 5.44/(Vout-0.8V) – 1.6 [kohm] RFB Example Vout(V) RFB(kohm) Vout(V) RFB(kohm) 0.8 OPEN 2.5 1.6 1.2 12 3.0 0.872 1.5 6.17 3.3 0.576 1.8 3.84 3.6 0.342 6 April 2013 LXDC55KAAA-205 Micro DC-DC converter 7. Typical Electric Performance (reference purpose only) (Ta=25℃) Micro DCDC Converter evaluation board (P2LX1568F) Measurement setup Power good Vout_S Load A GND_S Output voltage adjustment resistor Vout GND Vin V V GND Vin_S GND_S A V Enable SW * Evaluation board initial output Voltage setting : 3.3V ( resistor : 560Ω + 16Ω ) 7 April 2013 LXDC55KAAA-205 Micro DC-DC converter Efficency Vin=5.0V, Output Ripple-Noise Vin=5.0V, BW : 100MHz 8 April 2013 LXDC55KAAA-205 Micro DC-DC converter Load Regulation Vin=5.0V, Vout=0.8V Vin=5.0V, Vout=1.2V Vin=5.0V, Vout=1.8V Vin=5.0V, Vout=2.5V Vin=5.0V, Vout=3.3V Note: 1. This datasheet's specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. 2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 9 April 2013 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Murata: LXDC55KAAA-205