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PDF XC6371 Data sheet ( Hoja de datos )
| Número de pieza | XC6371 | |
| Descripción | PWM Controlled Step-Up DC/DC Contorollers/Convereters | |
| Fabricantes | Torex Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de XC6371 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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XC6371/XC6372/XC6373 Series
PWM Controlled Step - Up DC/DC Contorollers/Convereters
ETR0402_002
☆GO-Compatible
■GENERAL DESCRIPTION
The XC6371/6372/6373 series are a group of PWM controlled and PWM/PFM controlled step-up DC/DC converters. The
built-in 1.4Ω switching transistor type enables a step-up circuit to be configured using only three components, a coil, a diode,
and a capacitor.
Output voltage can be selectable in the range from 2.0V to 7.0V in increments of 100mV (accuracy:±2.5%). Oscillation
frequency is also selectable from 50kHz, 100kHz, and 180kHz (accuracy:±15%) for the XC6371 and the XC6372 series.
Soft-start time is internally set and offers protection against in-rush currents when the power is switched on and prevents
voltage overshoot. 5 pin packages, which are provided with either a CE (chip enable) function that reduces power
consumption during shut-down mode, or a VDD pin (separated power and voltage detect pins) are available.
The XC6371 series is the standard PWM controlled products. The control of the XC6372 series switches from PWM to PFM
control during light loads when automatically switching is selected and the series is highly efficient from light loads to large
output currents. Since the XC6373 series is a low noise, it is suitable for a wireless circuit. Also the series is particularly
suited for use with pager applications because oscillation frequency is set at 30kHz (±20%) so as to attain the lowest
consumption current possible.
■APPLICATIONS
●Cellular phones, Pagers
●Palmtops
●Cameras, Video recorders
●Portable products
■FEATURES
Operation Start Voltage Range : 0.9V~10V
Output Voltage Range : 2.0V~7.0V in 100mV increments
Highly Accurate
: Setting voltage accuracy±2.5%
Oscillation Frequency : 50kHz, 100kHz, 180kHz (±15%)
selectable (XC6371/72)
30kHz (XC6373)
Maximum Output Currents (Tr. built-in)
: 100mA(TYP.) @ VIN=3.0V, VOUT=5.0V *
Highly Efficient (Tr. built-in)
: 85%(TYP.) @ VIN=3.0V, VOUT=5.0V *
Built-in switching transistor type.
Five-lead packaged units offer either chip enable or
independent VOUT pin option.
Phase compensation and soft start-up circuits built-in.
CMOS Low Power Consumption
Small Packages
: SOT-89, SOT-89-5,USP-6B
*: Performance depends on external components and
PCB layout.
■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE
CHARACTERISTICS
1/19
1 page  
XC6371/XC6372/XC6373
Series
■ELECTRICAL CHARACTERISTICS
XC6371/72A501PR
VOUT=5.0V, FOSC=100kHZ
PARAMETER
SYMBOL
CONDITIONS
Output Voltage
VOUT
Maximum Input Voltage
VIN
Operation Start Voltage VST1
External Components Connected, IOUT=1mA
Oscillation Start Voltage
VST2
No external components. Apply voltage to VOUT
Lx : 10kΩ pull-up to 5V
No Load Input Current
IIN
VIN=VOUT×0.8, IOUT=0mA (*1)
Supply Current 1
IDD1
Same as VST2,
Apply output voltage×0.95 to VOUT
Supply Current 2
IDD2
Same as VST2,
Apply output voltage×1.1 to VOUT
Lx Switch-On
Resistance
RSWON
Same as IDD1, VLX=0.4V
Lx Leak Current
ILXL No external components. VOUT=VLX=10V
Oscillation Frequency FOSC
Same as IDD1. Measuring of Lx waveform
Maximum Duty Ratio MAXDTY
Same as IDD1. Measuring of Lx waveform
PFM Duty Ratio (*4) PFMDTY
Same as IDD1. Measuring of Lx waveform
Lx Limit Voltage
VLXLMT
Same as IDD1. Apply output voltage to Lx,
Voltage required to produce FOSC×2
Efficiency
EFFI
Slow-Start Time
TSS
MIN.
4.875
10
-
-
-
-
-
-
-
85
80
10
0.7
-
4.0
NOTE: Unless otherwise stated, VIN=VOUT×0.6, IOUT=50mA. See Typical Application Circuits, Circuit1
TYP.
5.000
-
-
-
12.8
80.2
8.2
1.4
-
100
87
17
-
85
10.0
Ta=25℃
MAX. UNITS
5.125
V
-V
0.90 V
0.80 V
25.7 μA
133.8 μA
16.5 μA
2.4 Ω
1.0 μA
115 kHz
92 %
25 %
1.3 V
-%
20.0 mS
*1: The Schottky diode (SD) must be type MA735, with reverse current (IR)<1.0μA at reverse voltage (VR)=10.0V.(XC6372A)
*2: "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically
operates which results in less average power consumption. The current actually provided by an external VIN source is represented by
"No Load Input Current (IIN)".
*3: When PWM operates at PWM Mode.
*4: When PFM operates at PFM Mode.(XC6372A)
5/19
5 Page 
XC6371/XC6372/XC6373
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(2) Efficiency vs. Output Current
XC6371A501PR
100
80
60
40
L＝100μH(CR54),CL＝47μF(Tantalum)
4.0V
VIN=0.9V
1.2V
3.0V
2.0V
1.5V
20
0
0.1
1 10 100 110000
Output Current:IOUT（mA）
XC6371A301PR
100
80
L＝100μH(CR54),CL＝47μF(Tantalum)
2.7V
60 VIN=0.9V
1.8 V
40 1.2V 1.5V
20
0
0.1
1 10 100 11000000
Output Current:IOUT（mA）
XC6373A300PR
100
80
L＝100μH(CR54), CL＝47μF（Tantalum）
2.7V
60 1.8V
40 VIN=0.9V 1.2V 1.5V
20
0
0.1 1 10 100 1000
Output Current: IOUT(mA)
11/19
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet XC6371.PDF ] | |
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