Document
Data Sheet
Dual 3 MHz, 800 mA Buck Regulators in WLCSP
ADP5133
FEATURES
Input voltage range: 2.3 V to 5.5 V Two 800 mA buck regulators Tiny, 16-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 BUCK1/BUCK2: output voltage range from 0.6 V to 3.8 V
APPLICATIONS
Power for processors, ASICs, FPGAs, and RF chipsets Portable instrumentation and medical devices Space constrained devices
GENERAL DESCRIPTION
The ADP5133 combines two high performance buck regulators in a tiny, 16-ball,2 mm × 2 mm WLCSP to meet demanding performance and board space requirements.
The high switchingfrequency ofthe buck regulators enables tiny multilayer external components and minimizes the boardspace. When the MODE pin is set high, the buck regulators operate in forced PWM mode. When the MODE pin is set low and the buck regulators operate in PWM mode, the loadcurrent is above a predefined threshold. When the load current falls belowa predefined threshold, the regulators operate in powersave mode (PSM), improving the light load efficiency.
The two bucksoperate outofphase to reduce the inputcapacitor requirement and noise.
The regulators in the ADP5133 are activated throughdedicated enable pins. The output voltagescan be externally set through a resistor feedback network.
Table 1. Related Devices
Model ADP5023 ADP5024 ADP5034
Channels 2 Bucks, 1 LDO 2 Bucks, 1 LDO 2 Bucks, 2 LDOs
ADP5037 ADP5033
ADP5040 ADP5041
ADP5133 ADP5134
2 Bucks, 2 LDOs
2 Bucks, 2 LDOs with 2 ENx pins
1 Buck, 2 LDOs 1 Buck, 2 LDOs with supervisory, watchdog, manual reset 2 Bucks with2 ENx pins
2 Bucks, 2 LDOs with precision enable and power-good output
Maximum Current 800 mA,300 mA 1.2 A, 300 mA 1.2 A, 300 mA
800 mA,300 mA 800 mA,300 mA
1.2 A, 300 mA 1.2 A, 300 mA
800 mA 1.2 A, 300 mA
Package LFCSP (CP-24-10) LFCSP (CP-24-10) LFCSP (CP-24-10), TSSOP (RE-28-1) LFCSP (CP-24-10) WLCSP (CB-16-8)
LFCSP (CP-20-10) LFCSP (CP-20-10)
WLCSP (CB-16-8) LFCSP (CP-24-7)
2.3V TO 5.5V
TYPICAL APPLICATION CIRCUIT
ADP5133
C1 4.7µF
VIN1
BUCK1
VOUT1 SW1 FB1
L1 1µH R1
ON EN1 OFF
PGND1
R2
VOUT1 @ 800mA C3 10µF
C2 4.7µF
ON OFF
VIN2 EN2
BUCK2
MODE
FPWM AUTO
VOUT2 SW2
L2 1µH
FB2
R3
PGND2
R4
VOUT2 @ 800mA C4 10µF
11991-001
AGND
Figure 1.
Rev. A
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