“PicoBK™” MYRGP-W/MYRGP-B series
1.0A Inductor Built-in Step-Down DC/DC Converters
☆GreenOperationCompatible
■GENERAL DESCRIPTION
The MYRGP-W/MYRGP-B series is a synchronous step-down micro DC/DC converter
which integrates an inductor and a control IC in one tiny package (2.0mm×2.5mm, 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 2.5V to 5.5V enables
support for applications that require an internally fixed output voltage (0.8V to 3.6V).
The MYRGP-W/MYRGP-B series use synchronous rectification at an operating frequency
of 3.0MHz. The MYRGP-W/MYRGP-B series use High Speed Transient Response -COT
synchronous rectification.
PWM control (MYRGP-W) or PWM/PFM switching control (MYRGP-B) automatic 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 forcedOFF when input voltagebecomes 2.0V or lower. WhenCE=Low,
the integrated CLdischarge function which enables the electric chargeat the outputcapacitor CL to be dischargedvia the internal
discharge switch located between the LX and VSS pins. The power consumption will be less than 1.0μA.
■FEATURES
■APPLICATIONS
Input Voltage
:2.5V~5.5V
: 0.8V~3.6V(±2.0%)
:3.0MHz
●Note BookPC
OutputVoltage
Switching Frequency
Output Current
Efficiency
●TabletPC
●SSD(Solid State Drive)
●Mobilephone
:1.0A
: 93% (VIN=5.0V, VOUT=3.3V/300mA)
: High Speed Transient Response -COT
100% DutyCycle
●Digital still camera
●Portable gamemachine
ControlMethods
PWM (MYRGP-W)
PWM/PFM(MYRGP-B)
: Thermal Shut Down Current
Limit Circuit(Drop)
CircuitProtection
Functions
Short Circuit Protection(Latch)
: Soft-start Circuit Built-in
UVLO
CLDischarge
: Low ESR CeramicCapacitor
Output Capacitor
Operating Ambient Temperature
Environmentally Friendly
: -40℃~+105℃
: EU RoHS Compliant, Pb Free
Halogen Free
■TYPICAL PERFORMANCE
■TYPICAL APPLICATIONCIRCUIT
CHARACTERISTICS
MYRGP-W/MYRGP-B
(VOUT=3.3V)
100
7
MYRGP-B
80
1 Lx
6
VIN
CIN
60
4.7μF
AGND
PGND 5
CE 4
2
3
CL
10μF
1.0A
40
VOUT
MYRGP-W
8
20
VIN=5.0V
0
0.1
1
10
100
1000
Output Current : IOUT(mA)
Export Control Code : X0863, Document No : D90DH00050
MYRGP-W/B series A01 Page 1 of 20