LDRXXYY STMICROELECTRONICS | Alldatasheet
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Technical content
I OUTPUT CURRENT 1 UP TO 500mA I OUTPUT CURRENT 2 UP TO 1.0A I LOW DROPOUT VOLTAGE 1 (0.3V @ IO =500mA) I LOW DROPOUT VOLTAGE 2 (0.4V @ I O =1A) I VERY LOW SUPPLY CURRENT (TYP.50µA IN OFF MODE, 1.6mA MAX IN ON MODE) I LOGIC-CONTROLLED ELECTRONIC SHUTDOWN I OUTPUT VOLTAGE AVAILABILITY FOR EACH REGULATOR: 1.8V, 2.5V, 3.3V I INTERNAL CURRENT AND THERMAL LIMIT I STABLE WITH LOW VALUE (MIN 4.7µF) AND LOW E.S.R. OUTPUT CAPACITORS I SUPPLY VOLTAGE REJECTION: 70dB (TYP .) I TEMPERATURE RANGE (-40°C TO 125°C)
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 (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 V O a Shutdown Logic Control function is available (TTL compatible) to decrease the total power consumption. LDRxxyy VERY LOW DROP DUAL VOLTAGE REGULATOR START UP 1 BAND GAP 1 DRIVER 1 POWER 1 THERMAL 1 THERMAL 2 START UP 2 BA ND GAP 2 DRIVER 2 POWER 2 VO1 VO2 INH2 INH1 VI2 VI1 ERROR AMPLIFIER 1 ERROR AMPLIFIER 2 Figure 1: Block Diagram PPAKSPAK-7L Rev. 2
Table 1: Absolute Maximum Ratings 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 Figure 2: Connection Diagram (top view) Table 3: Pin Description Table 4: Order Codes Symbol Parameter Value Unit VI1 & VI2 DC Input Voltage -0.3 to 15 V INH Shutdown Voltage -0.3 to 15 V IO Output Current Internally Limited PTOT Power Dissipation Internally Limited TSTG Storage Temperature Range -50 to +150 °C TA Operating Ambient Temperature Range -40 to +125 °C Symbol Parameter PPAK SPAK-7L Unit R THJ-C Junction to case thermal resistance 82 ° C / W Symbol Pin N° for PPAK Pin N° for SPAK-7L Name and Function GND 3 4 Ground pin VI1 2 2 Input 1 Supply Pin. Bypass with a 2.2µF capacitor to GND VI2 1 1 Input 2 Supply Pin. Bypass with a 2.2µF capacitor to GND VINH1 3 Enable 1 Pin. Internally connected to VI1 in the PPAK version VINH2 5 Enable 2 Pin. Internally connected to VI2 in the PPAK version VO1 4 6 Output 1 Pin. Bypass with a 4.7µF capacitor to GND Port VO2 5 7 Output 2 Pin. Bypass with a 4.7µF capacitor to GND Port N.C. Not Internally Connected VO1 VO2 TYPE PART NUMBERS SPAK-7L PPAK 1.8 V 2.5 V LDR1825 LDR1825K7-R LDR1825PT-R 1.8 V 3.3 V LDR1833 LDR1833K7-R LDR1833PT-R 2.5 V 1.8 V LDR2518 LDR2518K7-R LDR2518PT-R 2.5 V 3.3 V LDR2533 LDR2533K7-R LDR2533PT-R 3.3 V 1.8 V LDR3318 LDR3318K7-R LDR3318PT-R 3.3 V 2.5 V LDR3325 LDR3325K7-R LDR3325PT-R SPAK-7LPPAK
Table 5: Electrical Characteristics (VI1 = VO1 +2V, VI2 = VO2 +2V, VINH1 = VINH2 = 2.5V, C I1,2 = 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) (1): This test is not performed for VO <2.5V. (2): Guaranteed by design, but not tested in production. Figure 3: Typical Application Circuit Symbol Parameter Test Conditions Min. Typ. Max. Unit VO1 Output Voltage 1 -5 V NOM1 +5 %V VO2 Output Voltage 2 -5 V NOM2 +5 %V VDROP1 Dropout Voltage 1 (1) IO1 = 500mA 0.3 0.7 V VDROP2 Dropout Voltage 2 (1) IO2 = 1A 0.4 0.8 V ∆VO1 Line Regulation 1 V I1 = VO1 +2V to VO1 +7V, IO = 250mA 15 30 mV ∆VO2 Line Regulation 2 V I2 = VO2 +2V to VO2 +7V, IO = 500mA 15 40 mV ∆VO1 Load Regulation 1 V I1 = VO1 +2V, IO1 = 10 to 500mA 10 mV ∆VO2 Load Regulation 2 V I2 = VO2 +2V, IO2 = 10mA to 1A 60 mV ISTOT Total Supply Current I O1 = IO2 = NO LOAD 2 mA IS 1 Channel Supply Current NO LOAD 1 mA IQMAX Quiescent Current I O1 = 500mA, IO2 = 1A 30 mA ISC1 Short Circuit Current 1 T A = 25° 500 800 mA ISC2 Short Circuit Current 2 T A = 25° 1 1.6 A VINH-H Enable Voltage HIGH 2.4 V VINH-L Enable Voltage LOW 0.8 V IINH Enable Pin Current V INH = 5V 6 µA SVR Supply Voltage Rejection (2) VI1,2 = VO1,2 +3V ±1V, IO1,2 = 10 mA, f = 120Hz 70 dB eN RMS Output Noise (2) Bandwidth of 10Hz to 100KHz 0.003 %V O
DIM. mm. inch A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A2 0.03 0.23 0.001 0.009 B 0.4 0.6 0.015 0.023 B2 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 0.244 D1 5.1 0.201 E 6.4 6.6 0.252 0.260 E1 4.7 0.185 e 1.27 0.050 G 4.9 5.25 0.193 0.206 G1 2.38 2.7 0.093 0.106 H 9.35 10.1 0.368 0.397 L2 0.8 1 0.031 0.039 L4 0.6 1 0.023 0.039 L5 1 0.039 L6 2.8 0.110 PPAK MECHANICAL DATA 0078180-E
DIM. mm. inch A 1.78 2.03 0.070 0.080 A2 0.03 0.13 0.001 0.005 C 0.25 0.010 C1 0.25 0.010 D 1.02 1.27 0.040 0.050 D1 7.87 8.13 0.310 0.320 F 0.63 0.79 0.025 0.031 G 1.27 0.050 G1 7.62 0.3 H1 5.59 0.220 H2 9.27 9.52 0.365 0.375 H3 8.89 9.14 0.350 0.360 L 10.41 10.67 0.410 0.420 L1 7.49 0.295 L2 8.89 9.14 0.350 0.360 M 0.79 1.04 0.031 0.041 N 0.25 0.010 V3 ˚ 6 ˚3 ˚ 6 ˚ SPAK-7L MECHANICAL DATA PO13F2/A
DIM. mm. inch A 180 7.086 D 20.2 0.795 N 60 2.362 T 14.4 0.567 Tape & Reel SPAK-xL MECHANICAL DATA
DIM. mm. inch A 330 12.992 D 20.2 0.795 N 60 2.362 T 22.4 0.882 Tape & Reel DPAK-PPAK MECHANICAL DATA
Table 6: Revision History Date Revision Description of Changes 03-Aug-2004 2 Typing correction on tables 1, 3, 5 and figures 3, 6, 10, 11, 14, 17, 22, 23.
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