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3. TECHNICAL BRIEF
Figure 3-17. AD6537B POWER MODE LOGIC
2. LDO Block
1. There are 8 LDOs in the AD6537B.
- VCORE : supplies Digital baseband Processor core and AD6537B digital core (1.8V, 80mA)
- VMEM : supplies external memory and the interface to the external memory on the digital
baseband processor (1,8V or 2.8V, 150mA)
- VEXT : supplies Radio digital interface and high voltage interface (2.8V, 170mA)
- VSIM : supplies the SIM interface circuitry on the digital processor and SIM card
(1.8V or 2.85V, 20mA)
- VRTC : supplies the Real-Time Clock module (1.8 V, 20 A)
- VABB : supplies the analog portions of the AD6537B
- VMIC : supplies the microphone interface circuitry (2.5 V, 1 mA)
- VVCXO : supplies the voltage controlled crystal oscillator ( 2.75 V, 10 mA)
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