“PicoBK™” MYRGM-W/MYRGM-B series
1.5A Inductor Built-in Step-Down DC/DC Converters
☆GreenOperationCompatible
■GENERAL DESCRIPTION
The MYRGM-W/MYRGM-B series is a synchronous step-down mini DC/DC converter
which integrates an inductor and a control IC in one tiny package (2.5mm×3.2mm, h=1.0mm).
An internal coil simplifies the circuit and enables minimization of noise and other operational
trouble due to the circuit wiring. A wide operating voltage range of 2.7V to 5.5V enables
Support for applications that require an internally fixed output voltage (0.8V to 3.6V).
The MYRGM-W/MYRGM-B series use synchronous rectification at an operating frequency
of 3.0MHz. The MYRGM-W/MYRGM-B series use High Speed Transient Response-COT.
PWM control (MYRGM-W) or automatic PWM/PFM switching control (MYRGM-B) can be selected.
The series have a high speed soft-start as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock
Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When
CE=Low, the integrated CL discharge function which enables the electric charge at the output capacitor CL to be discharged via
the internal discharge switch located between the LX and VSS pins. The power consumption will be less than 1.0μA.
■FEATURES
■APPLICATIONS
Input Voltage
:2.7V~5.5V
:0.8V~3.6V
:3.0MHz
:1.5A
●Note BookPC
●TabletPC
●SSD
OutputVoltage
Oscillation Frequency
Output Current
Efficiency
●Mobilephone
●Projector
●Printer
: 92% (VIN=5.0V, VOUT=3.3V/500mA)
High Speed Transient Response-COT
:
ControlMethods
100% DutyCycle
PWM (MYRGM-W)
PWM/PFM(MYRGM-B)
: Thermal Shut Down Current
Limit Circuit(Drop)
CircuitProtection
Functions
Short Circuit Protection (Latch)
: Soft-start Circuit Built-in
UVLO
CLDischarge
Output Capacitor
: Low ESR CeramicCapacitor
Operating Ambient Temperature
EnvironmentallyFriendly
: -40℃~+105℃
: EU RoHS Compliant, Pb Free
Halogen Free
■TYPICAL PERFORMANCE
■TYPICAL APPLICATIONCIRCUIT
CHARACTERISTICS
MYRGM-W/MYRGM-B
(VOUT=3.3V)
100
MYRGM-B
80
60
40
MYRGM-W
20
VIN=5.0V
1000 10000
0
0.1
1
10
100
Output Current : IOUT (mA)
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