5-Channel Integrated Power Solution with Quad
Buck Regulators and 200 mA LDO Regulator
ADP5052
Data Sheet
FEATURES
TYPICAL APPLICATION CIRCUIT
ADP5052
SYNC/MODE
VREG
INT VREG OSCILLATOR
100mA
VDD
C1
RT
C0
FB1
PVIN1
4.5V TO 15V
BST1
C2
COMP1
CHANNEL 1
BUCK REGULATOR
(1.2A/2.5A/4A)
SW1
VOUT1
C4
Q1
DL1
SS12
PGND
DL2
RILIM1
RILIM2
Q2
PVIN2
COMP2
L1
VREG
EN1
C5
C3
CHANNEL 2
BUCK REGULATOR
(1.2A/2.5A/4A)
VREG
BST2
EN2
VOUT2
SW2
C6
L2
C7
FB2
PWRGD
PVIN3
C8
COMP3
EN3
BST3
CHANNEL 3
BUCK REGULATOR
(1.2A)
SW3
C9
L3
VOUT3
C10
FB3
PGND3
SS34
BST4
PVIN4
C11
COMP4
CHANNEL 4
BUCK REGULATOR
(1.2A)
EN4
1.7V TO 5.5V
C14
APPLICATIONS
Small cell base stations
FPGA and processor applications
Security and surveillance
Medical applications
PVIN5
EN5
SW4
C12
FB4
L4
VOUT4
C13
PGND4
CHANNEL 5
200mA LDO
REGULATOR
VOUT5
FB5
VOUT5
C15
10900-001
Wide input voltage range: 4.5 V to 15 V
±1.5% output accuracy over full temperature range
250 kHz to 1.4 MHz adjustable switching frequency
Adjustable/fixed output options via factory fuse
Power regulation
Channel 1 and Channel 2: programmable 1.2 A/2.5 A/4 A
sync buck regulators with low-side FET driver
Channel 3 and Channel 4: 1.2 A sync buck regulators
Channel 5: 200 mA low dropout (LDO) regulator
Always alive 5.1 V LDO supply for tiny load demand
Single 8 A output (Channel 1 and Channel 2 operated
in parallel)
Precision enable with 0.8 V accurate threshold
Active output discharge switch
FPWM or automatic PWM/PSM mode selection
Frequency synchronization input or output
Optional latch-off protection on OVP/OCP failure
Power-good flag on selected channels
UVLO, OCP, and TSD protection
48-lead, 7 mm × 7 mm LFCSP package
−40°C to +125°C junction temperature
EXPOSED PAD
Figure 1.
GENERAL DESCRIPTION
The ADP5052 combines four high performance buck regulators
and one 200 mA low dropout (LDO) regulator in a 48-lead LFCSP
package that meets demanding performance and board space
requirements. The device enables direct connection to high input
voltages up to 15 V with no preregulators.
Channel 1 and Channel 2 integrate high-side power MOSFETs and
low-side MOSFET drivers. External NFETs can be used in low-side
power devices to achieve an efficiency optimized solution and
deliver a programmable output current of 1.2 A, 2.5 A, or 4 A.
Combining Channel 1 and Channel 2 in a parallel configuration
can provide a single output with up to 8 A of current.
Channel 3 and Channel 4 integrate both high-side and low-side
MOSFETs to deliver output current of 1.2 A.
precision enable pin on each channel for easy power-up sequencing
or adjustable UVLO threshold.
The ADP5052 integrates a general-purpose LDO regulator with
low quiescent current and low dropout voltage that provides up
to 200 mA of output current.
Table 1. Family Models
Model
ADP5050
ADP5051
ADP5052
ADP5053
ADP5054
Channels
Four bucks, one LDO
Four bucks, supervisory
Four bucks, one LDO
Four bucks, supervisory
Four high current bucks
I2C
Yes
Yes
No
No
No
Package
48-Lead LFCSP
48-Lead LFCSP
48-Lead LFCSP
48-Lead LFCSP
48-Lead LFCSP
The switching frequency of the ADP5052 can be programmed
or synchronized to an external clock. The ADP5052 contains a
Rev. B
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