EV1380QI Datasheet, PDF (9/18 Pages) Enpirion, Inc. – 8a synchronous highly integrated dc-dc

Functional Block Diagram
EV1380 Datasheet
S_OUT
S_IN
S_DELAY
EV1380QI
VDDQ
M_S
Digital I/O
To PLL
UVLO
Thermal Limit
Current Limit
VDDB
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 EV1380QI 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
08888
9
March 18, 2015
www.altera.com/enpirion
Rev C