◆Regulators
with Green Operation (GO) Function
◆Output
Voltage Range: 0.8V ~ 4.0V
◆Output
Current: 200mA <Up to 250mA (TYP.)>
◆Low
ESR Capacitor Compatible
◆High
Ripple Rejection, Low Output Noise
◆CL
High-Speed Auto-Discharge (XC6217B/D)
◆Ultra
Small Package: USP-4D
■APPLICATIONS
●Cellular
phones
●Cordless
phones
●Wireless
communication equipment
●Portable
games
●Cameras,
VCRs
●Portable
AV equipment
●PDAs
The XC6217 series are precise, low noise, high speed, low
dropout regulators with green operation (GO) function. They
are fabricated using Torex’s CMOS process. Performance
features of the series include high ripple rejection and low
dropout voltage, and the series include a reference voltage
source, an error amplifier, a current limiter, and a phase
compensation circuit.
GO provides high speed operation, low power consumption
and high efficiencies by automatically switching between a high
speed mode (HS) and a power save mode (PS) depending
upon the load current level. The switching point of the GO to
the output current is being fixed inside the IC. When only
high-speed operation is required, it can be fixed by inputting a
high level signal to the GO pin, thus providing operating
conditions with the most suitable level of supply current for the
application.
The CE function enables the output to be turned off resulting in
greatly reduced power consumption. In this state, with the
XC6217B/D series, the IC turns on the internal switch located
between the V
OUT
and V
SS
pins. This short enables the
electric charge at the output capacitor (C
L
) to be discharged via
the internal auto-discharge resistance, and as a result the
V
OUT
pin quickly returns to the V
SS
level. The series' output
stabilization capacitor (C
L
) is also compatible with low ESR
ceramic capacitors.
Output voltage is selectable in 50mV increments within a range
of 0.8V~4.0V, using laser trimming technologies.
The current limiter's foldback circuit also operates as a short
circuit protection for the output current limiter and the output
pin.
■GENERAL
DESCRIPTION
■FEATURES
Output Current
Dropout Voltage
: 200mA <Up to 250mA (TYP.)>
: 80mV@ I
OUT
=100mA,
V
OUT(T)
=3.0V
Operating Voltage Range
: 1.6V ~ 6.0V (0.8V≦V
OUT(T)
≦1.55V
: 1.8V ~ 6.0V (1.6V≦V
OUT(T)
≦4.0V
Output Voltage
Setting Range
Accuracy
: 0.8V~4.0V (50mV increments)
: +2% (HS: V
OUT
>2.0V)
+30mV (HS: V
OUT
≦1.95V)
+2.5%, -3.5% (PS: V
OUT
>2.6V)
+3.5%, -4.5% (PS:1.6≦V
OUT
≦2.55V)
+70mV, -90mV (PS:0.8≦V
OUT
≦1.55V)
Low Power Consumption
: 4.5μA (TYP.) when PS mode
25μA (TYP.) when HS mode
Standby Current
: Less than 0.1μA
High Ripple Rejection
: 70dB @ 1kHz (When HS mode)
Operating Temperature
: -40℃~85℃
Range
Low ESR Capacitor
: 1.0μF Ceramic capacitor
compatible
Ultra Small Packages
: USP-4D, SOT-25,
■TYPICAL
APPLICATION CIRCUIT
VIN
Input
CE
CIN
1uF
(Ceramic)
VSS
GO
VOUT
Input
■
TYPICAL PERFORMANCE
CHARACTERISTICS
XC6217B281MR
VIN=3.8V,Tr=Tf=5usec, Ta=25
℃
CIN=CL=1.0uF(Ceramic)
2.9
2.85
VOUT_HSmode
2.8
2.9
2.85
VOUT_GOmode
2.7
2.65
2.6
2.55
Output Current
2.5
2.45
2.4
Time (500usec/div)
IOUT=0.1mA
IOUT=0.1mA
IOUT=50mA
2.6
2.55
2.5
2.8
2.75
2.7
2.65
VOUT_GOmode(V)
3
2.95
VOUT_HSmode(V)
CL
1uF
(Ceramic)
2.75
XC6217 ETR0322_010
1/30
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