Features: · Wide Range of Input Voltage • • • • • • • • • • • • •2.7V∼5.5V
· Built-in Soft-start Function (Typ. 2ms) and built-in power-on reset delay (Typ. 10ms)
· Maximum Output Current • • • • • •500mA(DC/DC), 200mA(VR)
· High Accuracy Output Voltage • • • • • • • • • •±2.0%(DC/DC and Voltage Regulator Output)
· Accuracy of voltage detector • • • • • • • • • • • • • • • • • •±2.5%
· Output Voltage(VR) • • • • • • • • •Stepwise Setting with a step of 0.1V in the range of 2.5V to 3.6V
· Output Voltage(DC/DC) • • • • • • Stepwise Setting with a step of 0.1V in the range of 1.5V to 3.3V
· Output Voltage(VD) • • • • • • • • •Stepwise Setting with a step of 0.1V in the range of 3.0V to 4.5V
· Packages • • • • • SOT23-6W(thickness: Max. 1.3mm) or HSON6(thickness: Max. 0.9mm)
Application· Power source for hand-held communication equipment, CD or DVD drives.
· Power source for battery-powered equipment.Pinout
Specifications
|
Symbol |
Item |
Rating |
Unit |
|
VIN |
VIN Pin Voltage |
6.5 |
V |
|
VLX |
Lx Pin Voltage |
-0.3∼VIN+0.3 |
V |
|
VOUT1 |
VOUT1 Pin Voltage |
-0.3∼VIN+0.3 |
V |
|
VOUT2 |
VOUT2 Pin Voltage |
-0.3∼VIN+0.3 |
V |
|
VDOUT |
VDOUT Pin Voltage |
-0.3∼VIN+0.3 |
V |
|
ILX |
Lx Pin Output Current |
800 |
mA |
|
IOUT2 |
VOUT2 Pin Output Current |
250 |
mA |
|
PD |
Power Dissipation(SOT23-6W) |
250 |
mW |
|
PD |
Power Dissipation
(HSON-6/Under Development) |
400 |
mW |
|
Topt |
Operating Temperature Range |
-40∼+85 |
°C |
|
Tstg |
Storage Temperature Range |
-55∼+125 |
°C |
DescriptionThe R5210X is CMOS-based PWM step-down DC/DC converter combined with a voltage regulator (VR) and a voltage detector (VD), with low supply current.
Each of these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, a current limit circuit, a phase compensation circuit, a resistor net for voltage detect circuit, an output driver transistor, and so on. A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with some external components, or an inductor, a diode, and capacitors.
The oscillator frequency of R5210X is 800kHz, therefore small inductor and capacitor can be used with this IC. Further, this IC equips the under voltage lockout function (UVLO). If the input voltage becomes 2.35V (Typ.) or less, the output of DC/DC converter is turned off. However, embedded voltage regulator and the detector continue to operate.
The voltage regulator of R5210X consists of a reference voltage unit, a resistor net for voltage detect circuit, an error amplifier, an output driver transistor, and so on.
The built-in voltage detector supervises the input voltage and the output is N-channel open drain type. Power-on reset delay time is also included and internally set typically at 10ms.
R5210X Data Sheet
