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RB051LA-40TR Datasheet(PDF) 6 Page - Seiko Instruments Inc |
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RB051LA-40TR Datasheet(HTML) 6 Page - Seiko Instruments Inc |
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6 / 50 page  STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series Rev.2.0_01 6 Electrical Characteristics Table 5 Electrical Characteristics (VIN = 1.8 V, VOUT = 3.3 V, Ta = +25°C unless otherwise specified) Item Symbol Conditions Min. Typ. Max. Unit Test Circuit Operating start voltage*1 VST IOUT = 1 mA, VOUT(S)*2 = 3.3 V ⎯ ⎯ 0.9 V 2 Operating input voltage VIN ⎯ ⎯ ⎯ 4.5 V 2 Output voltage range VOUT(R) ⎯ 1.8 ⎯ 5.0 V 2 FB voltage VFB ⎯ 0.585 0.600 0.615 V 1 FB voltage temperature coefficient ΔVFB ΔTa Ta = −40°C to +85°C ⎯ ± 100 ⎯ ppm/ °C1 FB pin input current IFB VOUT = 1.8 V to 5.5 V, FB pin −0.1 ⎯ ＋ 0.1 μA 1 Current consumption during operation IIN1 During switching, at no load VFB = VFB(S)*3 × 0.95 ⎯ 6 15 μA 1 ISS1 ⎯ 450 650 μA 1 Current consumption during switching off IIN2 During switching stop VFB = VFB(S) × 1.1 ⎯ 6 15 μA 1 ISS2 ⎯ 95 150 μA 1 Current consumption during power-off ISSS OFF / ON V = 0 V, VIN = VOUT = 4.5 V ⎯ ⎯ 3.0 μA 1 Oscillation frequency fOSC ⎯ 1.0 1.2 1.4 MHz 2 Maximum duty ratio MaxDuty VFB = VFB(S) × 0.95 82 88 94 % 2 PWM / PFM switching duty ratio PFMDuty ⎯ ⎯ 13 ⎯ % 2 Power MOS FET ON resistance*4 RNFET ⎯ ⎯ 0.25 ⎯ Ω 1 Power MOS FET leakage current ILSW OFF / ON V = 0 V ⎯ 0.01 0.5 μA 1 Limited current ILIM ⎯ 0.9 1.1 1.3 A 3 High level input voltage VSH VIN = 1.8 V to 4.5 V, OFF ON/ pin 0.75 ⎯ ⎯ V 1 Low level input voltage VSL VIN = 1.8 V to 4.5 V, OFF ON/ pin ⎯ ⎯ 0.25 V 1 High level input current ISH VIN = 1.8 V to 4.5 V, OFF ON/ pin −0.1 ⎯ 0.1 μA 1 Low level input current ISL VIN = 1.8 V to 4.5 V, OFF ON/ pin −0.1 ⎯ 0.1 μA 1 Soft-start time*5 tSS ⎯ 0.6 1.2 1.8 ms 2 *1. This is the guaranteed value measured with external parts shown in “Table 6 External Parts List” and with test circuits shown in Figure 6. The operating start voltage varies largely depending on diode’s forward voltage. Perform sufficient evaluation with actual application. *2. VOUT(S) can be set by the ratio of VFB value and the output voltage setting resistors (RFB1, RFB2). For details, refer to “ External Parts Selection”. *3. VFB(S) is a setting value for FB voltage. *4. Power MOS FET ON resistance largely varies depending on the VOUT voltage. *5. This is when the VOUT voltage startups from the STU release voltage or more. The soft-start time largely varies depending on the load current and the input voltage when the S-8363 Series startups from the STU release voltage or less, because the S-8363 Series once enters the start-up mode. Refer to “ 2. Low voltage start-up” for STU release voltage. External Parts List When Measuring Electrical Characteristics Table 6 External Parts List Element name Symbol Constants Manufacturer Part number Inductor L 2.2 μH TDK Corporation VLF302510 Diode SD － TOSHIBA CORPORATION CRS08 Input capacitor CIN 1 μF TAIYO YUDEN Co., Ltd. EMK107B7105KA Output capacitor COUT 10 μF TAIYO YUDEN Co., Ltd. LMK212BJ106KD FB pin capacitor CFB 47 pF TAIYO YUDEN Co., Ltd. UMK105CH470JV Output voltage setting resistor 1 RFB1 68 k Ω ROHM Co., Ltd. MCR03 series Output voltage setting resistor 2 RFB2 15 k Ω ROHM Co., Ltd. MCR03 series |
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Similar Description - RB051LA-40TR |
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