EV1380QI Datasheet, PDF (9/16 Pages) Enpirion, Inc. – 8a synchronous highly integrated dc-dc

Functional Block Diagram
EV1380 Datasheet Rev A
S_OUT
S_IN
S_DELAY
EV1380QI
VDDQ
M_S
Digital I/O
To PLL
UVLO
Thermal Limit
Current Limit
VDDB
Over Voltage
HS-Drive
NC(SW)
AVIN
FQADJ
ENABLE
(-)
PWM
Comp
(+)
PLL / Sawtooth
Generator
LS-Drive
Compensation
Network
EAOUT
(-)
Error
Amp
(+)
power
Good
Logic
V_OUT
PGND
VFB
POK
VDDQOK
VREF
Soft Start
Pre-bias
Bandgap
Reference
AVIN
VDDQ
AGND AVIN _{EN_PB} EAOUT
VSENSE
Figure 4: Functional Block Diagram
Functional Description
Synchronous Buck Converter
The EV1380 is a synchronous, programmable
Buck power supply with integrated power
MOSFET switches and integrated inductor.
The switching supply uses voltage mode
control and a low noise PWM topology.
Typically two power sources are required to
operate this device. The first power source
(AVIN) is for the controller with a nominal input
voltage range of 3.07-3.53V. The second
supply (VDDQ) is the supply that is tracked -
the recommended operating range is 1.16 to
1.65V. With the right choice of input and output
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