Dual 3 MHz, 800 mA Buck Regulators in WLCSP
Data Sheet
ADP5133
The two bucksoperate outofphase to reduce the inputcapacitor
requirement and noise.
FEATURES
Input voltage range: 2.3 V to 5.5 V
Two 800 mA buck regulators
T iny, 1 6 -ball, 2 mm × 2 mm WLCSP package
Regulator accuracy: 1.8%
Factory programmable or external adjustable VOUTx
3 MHz buck operation with forced PWM and auto PWM/PSM
modes
The regulators in theADP5133 areactivated through dedicated
enablepins. The output voltagescan be externally set through a
resistor feedbacknetwork.
Table 1. Related Devices
Maximum
Current
Model
Channels
Package
BUCK1/BUCK2: output voltage range from 0.6 V to 3.8 V
ADP5023 2 Bucks, 1 LDO
ADP5024 2 Bucks, 1 LDO
ADP5034 2 Bucks, 2 LDOs
800 mA,300mA LFCSP (CP-24-10)
APPLICATIONS
1.2 A, 300 mA
1.2 A, 300 mA
LFCSP (CP-24-10)
LFCSP (CP-24-10),
TSSOP (RE-28-1)
Power for processors, ASICs, FPGAs, and RF chipsets
Portable instrumentation and medical devices
Space constrained devices
ADP5037 2 Bucks, 2 LDOs
ADP5033 2 Bucks, 2 LDOs with
2 ENx pins
800 mA,300mA LFCSP (CP-24-10)
800 mA,300mA WLCSP (CB-16-8)
GENERAL DESCRIPTION
ADP5040 1 Buck, 2 LDOs
1.2 A, 300 mA
1.2 A, 300 mA
LFCSP (CP-20-10)
LFCSP (CP-20-10)
The ADP5133 combines two high performance buckregulators
in a tiny, 16-ball,2mm ×2mm WLCSPto meet demanding
performance and board space requirements.
ADP5041 1 Buck, 2 LDOs with
supe r vi sor y, watchdog,
manual reset
ADP5133 2 Bucks wit h 2 ENx pins 800 mA
WLCSP (CB-16-8)
LFCSP (CP-24-7)
The high switchingfrequency ofthe buck regulators enables tiny
multilayer external components and minimizes the boardspace.
When the MODEpin is set high, the buckregulators operatein
forced PWM mode. When the MODEpin is set low and the
buck regulators operatein PWM mode, the loadcurrent is above
a predefined threshold. When the load current falls belowa
predefined threshold, the regulators operate in power save
mode (PSM), improving the light load efficiency.
ADP5134 2 Bucks, 2 LDOs with
precision enable and
1.2 A, 300 mA
power-good output
TYPICAL APPLICATION CIRCUIT
ADP5133
VOUT1
VIN1
2.3V TO 5.5V
L1 1µH
R1
R2
SW1
FB1
VOUT1 @
800mA
C1
4.7µF
BUCK1
C3
10µF
ON
EN1
PGND1
MODE
OFF
FPWM
AUTO
VOUT2
SW2
VIN2
EN2
L2 1µH
C2
VOUT2 @
800mA
4.7µF
BUCK2
R3
R4
FB2
C4
10µF
ON
PGND2
OFF
AGND
Figure 1.
Rev. A
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