LP3927ILQX-AJ National Semiconductor, LP3927ILQX-AJ Datasheet - Page 12

• 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)
Keyboard Held at Start-Up/Shut-Down
20037926
Note: Diagram indicates Open Drain IRQ tied to V
.
DD
*** = Internal signal
1. Keyboard de-bounce delay, 32msec typ.
2. Delay between LDO1 reaching 95% of its output voltage and LDO2 enable.
3. Both LDO1 and LDO2 outputs reach 95% of the respective output voltage, start RST timer.
4. Reset delay.
5. IRQ is active low.
6. Keyboard press must be greater than 32 msec.
7. PS_HOLD timer begins upon RST going high.
8. Maximum of 500 msec period from RST going high to PS_HOLD going high.
9. Response time from PS_HOLD going low to RST going low.
10. Delay between RST high-low transition to LDO2 disable.
11. Delay between LDO2 disable and LDO1 disable.
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