User`s guide

Setting up Power Management
i.MX53 System Development User’s Guide, Rev. 1
5-20 Freescale Semiconductor
5.6.2 LTC3589-1
The LTCR3589 is a complete solution that fulfills the i.MX53 power management needs. It includes:
• 3 buck converters for the core, memory, and SoC rails
• A synchronous buck-boost regulator for I/O
• 3 250mA LDO regulators
• An I
2
C serial port for communication with processor
• Always Alive LDO regulator for RTC voltage domain
LDO9 VLD09 1.25–3.6 V
±3% accuracy
default 2.5 V
100 mA 1.0 μF High PSSR, low noise, 50 mV steps, TOP trimmed,
optional hardware control from GPI12, common
supply with LDO10
LDO10 VLD10 1.2–3.6 V ±3%
accuracy
default 1.8 V
250 mA 2.2 μF High PSSR, low noise, 50 mV steps, common supply
with LDO9
Backup VBBAT 1.1–3.1 V ±3%
accuracy
default 3.0 V
6 mA 470 nF 100/200 mV steps, configurable current limit
between 100 and 6000 μA, reverse current
protection
LDOCore Internal
PMIC
supply
2.5 V ±2%
accuracy
4 mA 100 nF Not for external use
Table 5-3. Generated Supply Domains (continued)
Regulator
Supplied
pins
Supplied
voltage
Supplied
max
current
External
component
Notes