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MAX6883 Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX6883 Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 19 page Dual-/Triple-Voltage, Power-Supply Sequencers/Supervisors _______________________________________________________________________________________ 9 Pin Description PIN MAX6880 MAX6881 MAX6882 MAX6883 NAME FUNCTION 1, 11, 12, 15 —— 1, 8, 9, 10 N.C. No Connection. Not internally connected. 2— 1 — ABP Internal Supply Bypass Input. Bypass ABP with a 1µF capacitor to GND. ABP maintains the device supply voltage during rapid power- down conditions. 32 —— SET3 432 2 SET2 543 3 SET1 Externally Adjusted IN_ Undervoltage Lockout Threshold. Connect SET_ to an external resistor-divider network to set the desired undervoltage threshold for each IN_ supply (see the Typical Application Circuit). All SET_ inputs must be above the internal SET_ threshold (0.5V) to enable sequencing functionality. 654 4 EN/ UV Logic-Enable Input or Undervoltage Lockout Monitor Input. EN/ UV must be high (EN/ UV > VEN_R) to enable voltage sequencing power-up operation. OUT_ begins tracking down when EN/ UV < VEN_F. Connect EN/UV to an external resistor-divider network to set the external UVLO threshold. 765 5 GND Ground 876 6 DELAY Sequence Delay Select Input. Connect a capacitor from DELAY to GND to select the desired delay period before sequencing is enabled (after all SET_ inputs and EN/ UV are above their respective thresholds) or between supply sequences. Leave DELAY unconnected for the default 200µs delay period. 987 7 SLEW Slew-Rate Adjustment Input. Connect a capacitor from SLEW to GND to select the desired OUT_ slew rate. 10 — 8 — TIMEOUT PG/ RST Timeout Period Adjust Input. PG/RST asserts high after the timeout period when all OUT_ exceed their IN_ referenced threshold. Connect a capacitor from TIMEOUT to GND to set the desired timeout period. Leave TIMEOUT unconnected for the default 200µs delay period. 13 — 9 — MARGIN Margin Input, Active-Low. Drive MARGIN low to enable margin mode (see the Margin section). The MARGIN functionality is disabled (returns to normal monitoring mode) after MARGIN returns high. MARGIN is internally pulled up to ABP through a 10µA current source. |
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