LDR3318

LDRxxyy VERY LOW DROP DUAL VOLTAGE REGULATOR s s s s s s s s s s s OUTPUT CURRENT 1 UP TO 500mA OUTPUT CURRENT 2 UP TO 1.0A LOW DROPOUT VOLTAGE 1 (0.3V @ IO =500mA) LOW DROPOUT VOLTAGE 2 (0.4V @ IO =1A) VERY LOW SUPPLY CURRENT (TYP.50µA IN OFF MODE, 1.6mA MAX IN ON MODE) LOGIC-CONTROLLED ELECTRONIC SHUTDOWN OUTPUT VOLTAGE AVAILABILITY FOR EACH REGULATOR: 1.8V, 2.5V, 3.3V INTERNAL CURRENT AND THERMAL LIMIT STABLE WITH LOW VALUE (MIN 4.7µF) AND LOW E.S.R. OUTPUT CAPACITORS SUPPLY VOLTAGE REJECTION: 70dB (TYP.) TEMPERATURE RANGE (-40°C TO 125°C) SPAK-7L PPAK DESCRIPTION The LDRxxyy is a Very Low Drop Dual Voltage Regulator available in PPAK for the version without inhibit and in SPAK-7L for the version with the shutdown feature. The very low drop-voltage Figure 1: Block Diagram VI1 POWER 1 (0.5V) and the very low supply current make it particularly suitable for low noise and low power applications such as PDA, MICRODRIVE and other data storage applications while the used high voltage technology makes this device suitable for consumer applications such as MONITORS AND SET-TOP-BOX. For each VO a Shutdown Logic Control function is available (TTL compatible) to decrease the total power consumption. VO1 INH1 START UP 1 BAND GAP 1 DRIVER 1 + ERROR AMPLIFIER 1 THERMAL 1 THERMAL 2 + ERROR AMPLIFIER 2 INH2 START UP 2 BAND GAP 2 DRIVER 2 VI2 POWER 2 VO2 August 2004 Rev. 2 1/13 LDRxxyy Table 1: Absolute Maximum Ratings Symbol VI1 & VI2 INH IO PTOT TSTG TA DC Input Voltage Shutdown Voltage Output Current Power Dissipation Storage Temperature Range Operating Ambient Temperature Range Parameter Value -0.3 to 15 -0.3 to 15 Internally Limited Internally Limited -50 to +150 -40 to +125 °C °C Unit V V Absolute Maximum Rating are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 2: Thermal Data Symbol RTHJ-C Parameter Junction to case thermal resistance PPAK 8 SPAK-7L 2 Unit °C/W Figure 2: Connection Diagram (top view) PPAK SPAK-7L Table 3: Pin Description Symbol GND VI1 VI2 VINH1 VINH2 VO1 VO2 N.C. 4 5 Pin N° for PPAK 3 2 1 Pin N° for SPAK-7L 4 2 1 3 5 6 7 Name and Function Ground pin Input 1 Supply Pin. Bypass with a 2.2µF capacitor to GND Input 2 Supply Pin. Bypass with a 2.2µF capacitor to GND Enable 1 Pin. Internally connected to VI1 in the PPAK version Enable 2 Pin. Internally connected to VI2 in the PPAK version Output 1 Pin. Bypass with a 4.7µF capacitor to GND Port Output 2 Pin. Bypass with a 4.7µF capacitor to GND Port Not Internally Connected Table 4: Order Codes VO1 1.8 V 1.8 V 2.5 V 2.5 V 3.3 V 3.3 V 2/13 VO2 2.5 V 3.3 V 1.8 V 3.3 V 1.8 V 2.5 V PART NUMBERS TYPE SPAK-7L LDR1825 LDR1833 LDR2518 LDR2533 LDR3318 LDR3325 LDR1825K7-R LDR1833K7-R LDR2518K7-R LDR2533K7-R LDR3318K7-R LDR3325K7-R PPAK LDR1825PT-R LDR1833PT-R LDR2518PT-R LDR2533PT-R LDR3318PT-R LDR3325PT-R LDRxxyy Table 5: Electrical Characteristics (VI1 = VO1+2V, VI2 = VO2+2V, VINH1 = VINH2 = 2.5V, CI1,2 = 2.2µF, CO1,2 = 4.7µF, IO1 = IO2 = 10mA, TA = -40°C to 125°C, unless otherwise specified. Typical values are referred at TA = 25°C) Symbol VO1 VO2 Parameter Output Voltage 1 Output Voltage 2 IO1 = 500mA IO2 = 1A VI1 = VO1+2V to VO1+7V, IO = 250mA VI2 = VO2+2V to VO2+7V, IO = 500mA VI1 = VO1+2V, IO1 = 10 to 500mA VI2 = VO2+2V, IO2 = 10mA to 1A IO1 = IO2 = NO LOAD NO LOAD IO1 = 500mA, IO2 = 1A TA = 25° TA = 25° 500 1 2.4 0.8 VINH = 5V VI1,2 = VO1,2 +3V ±1V, IO1,2 = 10 mA, f = 120Hz Bandwidth of 10Hz to 100KHz 6 70 0.003 Test Conditions Min. -5 -5 Typ. VNOM1 VNOM2 0.3 0.4 15 15 10 60 2 1 30 800 1.6 Max. +5 +5 0.7 0.8 30 40 Unit %V %V V V mV mV mV mV mA mA mA mA A V V µA dB %VO VDROP1 Dropout Voltage 1 (1) VDROP2 Dropout Voltage 2 (1) ∆VO1 ∆VO2 ∆VO1 ∆VO2 ISTOT IS IQMAX ISC1 ISC2 VINH-H VINH-L IINH SVR eN Line Regulation 1 Line Regulation 2 Load Regulation 1 Load Regulation 2 Total Supply Current 1 Channel Supply Current Quiescent Current Short Circuit Current 1 Short Circuit Current 2 Enable Voltage HIGH Enable Voltage LOW Enable Pin Current Supply Voltage Rejection (2) RMS Output Noise (2) (1): This test is not performed for VO