LP3927ILQX-AJ National Semiconductor, LP3927ILQX-AJ Datasheet - Page 13

• Manufacturer Part Number: LP3927ILQX-AJ
• Manufacturer: National Semiconductor
• Type: Power Management Sysr

Specifications of LP3927ILQX-AJ

• Output Current: 200mA
• Output Voltage: 2.6/2.85/2.9/3V
• Operating Supply Voltage (min): 3.3V
• Operating Supply Voltage (typ): 3.7V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Package Type: LLP EP
• Mounting: Surface Mount
• Pin Count: 28
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Not Compliant

Timing Diagrams
(Continued)
VEXT Detect Start-Up/Shut Down
20037927
Note: Diagram indicates Open Drain IRQ tied to V
.
DD
*** = Internal signal
1. VEXT goes active low.
2. VEXT 32 msec de-bounce period.
3. Delay between LDO1 and LDO2 enables.
4. Both LDO1 and LDO2 outputs reach 95% of respective output voltage, start Reset timer.
5. Reset delay.
6. Period between Reset and PS_HOLD going high is not relevant since VEXT is low
7. PS_HOLD goes low but LDOs continue to run since VEXT is low.
8. PS_HOLD is low and VEXT goes high, RST pin goes low.
9. Delay between RST going low and LDO2 disabled.
10. Delay between LDO2 and LDO1 disabled.
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