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S-8366ABABB-M6T1U2 Datasheet(PDF) 10 Page - Seiko Instruments Inc |
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S-8366ABABB-M6T1U2 Datasheet(HTML) 10 Page - Seiko Instruments Inc |
10 / 63 page STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER S-8365/8366 Series Rev.2.1_01 10 Electrical Characteristics 1. 1.2 MHz product Table 8 Electrical Characteristics (VDD = 3.3 V, Ta = 25 °C unless otherwise specified) Item Symbol Conditions Min. Typ. Max. Unit Test Circuit Input voltage*1 VDD − 1.8 − 5.5 V 2 Operating start voltage*2 VST1 Product without UVLO function, IOUT = 1 mA − − 1.1 V 3 Oscillation start voltage VST2 No external parts for product without UVLO function, − − 1.0 V 1 Operation holding voltage VHLD Product without UVLO function, IOUT = 1 mA, Determined by decreasing VDD gradually 0.8 − − V 3 FB voltage VFB − 0.588 0.6 0.612 V 1 FB voltage temperature coefficient ΔVFB ΔTa Ta = −40°C to +85°C − ±100 − ppm/ °C1 FB pin input current IFB VDD = 1.8 V to 5.5 V, FB pin - 0.1 ⎯ 0.1 μA 1 Current consumption at operation*3 ISS1 At switching operation, no load VFB = VFB(S) × 0.95 − 500 − μA 1 Current consumption at switching off ISS2 At switching stop, VFB = VFB(S) × 1.5 − 70 120 μA 1 Current consumption at shutdown ISSS OFF / ON V = 0 V − − 1.0 μA 1 EXT pin output current IEXTH VEXT = VDD − 0.4 V − −130 −60 mA 1 IEXTL VEXT = 0.4 V 100 200 − mA 1 Oscillation frequency fosc − 1.0 1.2 1.4 MHz 1 Maximum duty ratio Max Duty VFB = VFB(S) × 0.95 80 85 90 % 1 PWM / PFM switching Duty ratio*4 PFM Duty VDD = VOUT(S) − 0.1 V, no load 20 28 36 % 2 Short-circuit protection delay time*5 tPRO Product with short-circuit protection, At CSP = 0.1 μF 37.5 50 75 ms 1 UVLO release voltage VUVLO+ Product with UVLO function 1.60 1.70 1.78 V 1 UVLO hysteresis width VUVLOHYS Product with UVLO function 0.05 0.10 0.15 V 1 High level input voltage VSH VDD = 1.8 V to 5.5 V, OFF ON/ pin 0.75 − − V 1 Low level input voltage VSL VDD = 1.8 V to 5.5 V, OFF ON/ pin − − 0.3 V 1 High level input current ISH Product without OFF ON/ pin pull-down, VDD = 1.8 V to 5.5 V, OFF ON/ pin −0.1 − 0.1 μA 1 Product with OFF ON/ pin pull-down, VDD = 1.8 V to 5.5 V, OFF ON/ pin 0.2 1.0 2.5 μA 1 Low level input current ISL VDD = 1.8 V to 5.5 V, OFF ON/ pin −0.1 − 0.1 μA 1 Soft-start time tSS − 5 7 10 ms 2 *1. The S-8365/8366 Series steps up from VDD = 1.1 V, but set the input voltage as to 1.8 V ≤ VDD ≤ 5.5 V for stabilizing the output voltage and oscillation frequency. *2. This is the guaranteed value measured with external parts shown in “Table 10 External Parts List” and with test circuits shown in Figure 10. The operating start voltage varies largely depending on diode’s forward voltage. Evaluate sufficiently with actual device. *3. VFB(S) is a setting value for FB voltage. *4. VOUT(S) is a setting value for output voltage. VOUT is the typical value of actual output voltage. VOUT(S) can be set by using the rate of VFB and the output voltage setting resistors (RFB1, RFB2). For details, refer to “ External Parts Selection”. *5. The short-circuit protection time can be set by the external capacitor, and the maximum set value by the external capacitor is unlimited when an ideal case is assumed. But use CSP = approximately 0.47 μF as a target maximum value due to the need to consider the discharge time of the capacitor. For details, refer to “ External Parts Selection”. |
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