XC9303 升压降压转换芯片

Efficiency EFFI (%)
XC9303B093K(300kHz, VOUT=3.3V)
L=22uH(CDRH127/LD), CL=94uF(Tantalum),SD:CMS02
Tr1:CPH6315, Tr2:CPH3409, Tr3:CPH3409 100
PW M/PFM Switching Control 90
DESIGNATOR ①
ITEM Type of DC/DC Controller
SYMBOL B
DESCRIPTION Standard type
②③
Output Voltage
09
FB Voltage: 0.9V
④
Oscillation Frequency
3
300kHz
⑤⑥-⑦(*1)
Packages (Order Unit)
Ta = 25℃ UNITS
V V V V V mA mW ℃ ℃
3/20
XC9303 Series
■ ELECTRICAL CHARACTERISTICS
XC9303B093
PARAMETER Supply Voltage Maximum Input Voltage Output Voltage Range (*1) Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency
Ground
8
EXT2
External Transistor Drive Pin <Connected to Low side of N-ch Power MOSFET Gate>
■PRODUCT CLASSIFICATION
●Ordering Information
XC9303①②③④⑤⑥-⑦(*1)
SYMBOL VDD VFB VEN VPWM VEXT IEXT Pd Topr Tstg
RATINGS - 0.3 ~ 12.0 - 0.3 ~ 12.0 - 0.3 ~ 12.0 - 0.3 ~ 12.0 - 0.3 ~ VDD + 0.3
±100 150 - 40 ~ + 85 - 55 ~ +125
KR KR-G
MSOP-8A (1,000/Reel) MSOP-8A (1,000/Reel)
(*1) The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2/20
■ BLOCK DIAGRAM
Supply Voltage
PWM/PFM Switching Pin <PWM control when connected to VDD, PWM / PFM auto switching when connected to Ground. > Chip Enable Pin <Connected to Ground when output is stand-by mode. Connected to VDD when output is active. EXT/1 is high and EXT2/ is high when in stand-by mode. >
EXT1/ FB
CEΒιβλιοθήκη Error Am p+
-
Synchronou s Blank Logic
PWM Com pa rator
+
-
PWM /PFM Con troll er
V re f = 0 . 9 V with Soft-Start,
CE
CE to interna l ci rcui t
R am p Wave Gene rator,
<XC9303B093K OUTPUT= 3.3V>
Tr1:Pch MOSFET :C PH 6315
Tr2:Nch M OSFET :C PH 3409
CIN :47uF
PWM CE
V IN :2.0V~10V
EXT1 V DD PWM CE
EXT2 GND FB NC
L:22uH C D R H 127/LD
4 CE
NC 5
■ pletely: i
MSOP-8A (TOP VIEW)
PIN NUMBER PIN NAME
1
EXT 1 /
2
VDD
3
PWM
4
CE
5
NC
6
FB
7
GND
FUNCTIONS
External Transistor Drive Pin <Connected to High Side of P-ch Power MOSFET Gate>
XC9303 Series
High Efficiency, Synchronous Step-Up & Down DC / DC Controller ICs
ETR0602_005
☆Green Operation Compatible
■GENERAL DESCRIPTION
The XC9303 series is highly efficient, synchronous PWM, PWM/PFM switchable step-up & down DC/DC controller ICs. A versatile, large output current and high efficiency, step-up/down DC/DC controller can be realized using only basic external components - transistors, coil, diode, capacitors, and resistors for detecting voltages. High efficiency is obtained through the use of a synchronous rectification topology. The operation of the XC9303 series can be switched between PWM and PWM/PFM (auto switching) externally using the PWM pin. In PWM/PFM mode, the XC9303 automatically switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of output loads conditions. Output noise can be easily reduced with PWM control since the frequency is fixed. Synchronous rectification control can be switched to non-synchronous by using external signals (MODE pin). High efficiency can be regulated at heavy loads when synchronous operation. The XC9303 has a 0.9V (±2.0%) internal voltage supply and using externally connected components, output voltage can be set freely between 2.0V to 6.0V. With an internal 300kHz switching frequency smaller external components can be used. Soft-start time is internally set to 10ms and offers protection against in-rush currents when the power is switched on and prevents voltage overshoot.
No Connection Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage can be set freely by connecting split resistors between VOUT and Ground. >
OSC
XC9303
Series
EXT2
PWM VIN GND
■ ABSOLUTE MAXIMUM RATINGS
PARAMETER VDD Pin Voltage FB Pin Voltage CE Pin Voltage PWM Pin Voltage EXT1, 2 Pin Voltage EXT1, 2 Pin Current Power Dissipation Operating Ambient Temperature Storage Temperature Range
: 2.0V ~ 6.0V (set freely with VFB=0.9V)
: 300kHz (±15%)
Output Current
: 800mA(VIN = 4.2V, VOUT=3.3V)
Stand-By Function
: 3.0μA (MAX.)
Maximum Duty Cycle : 78% (TYP.)
80
70
60
50
40
VIN=2.7V
4.2V
30
20
PW M Control
10
0
0.1
1
10
100 1000 10000
Output Current IOUT (mA)
1/20
XC9303 Series
■PIN CONFIGURATION
1 EXT1 EXT2 8
2 VDD
GND 7
3 PWM
FB 6
High Efficiency
: 84% (TYP.)
Soft-Start Time
: 10ms (internally fixed)
Package
: MSOP-8A
Environmentally Friendly: EU RoHS Compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT
SD:CM S02
V OUT :3. 3V
Tr3:Nch MOSFET :C PH 3409 CFB :62pF
RFB :200 kΩ
CL: 47uF X2
RFB :75 kΩ
■TYPICAL PERFORMANCE
CHARACTERISTICS
●Efficiency vs. Output Current
SYMBOL VDD VIN
VOUTSET IDD1 IDD2 ISTB FOSC VFB VINmin
MAXDTY MINDTY PFMDTY
EFFI TSS REXTBH1 REXTBL1 REXTBH2 REXTBL2 VPWMH VPWML VCEH VCEL ICEH ICEL IPWMH IPWML IFBH IFBL
■APPLICATIONS
●PDAs ●Palmtop computers ●Portable audios ●Various power supplies
■FEATURES
Input Voltage Range : 2.0V ~ 10V
Output Voltage Range Oscillation Frequency
FB Voltage Minimum Operation Voltage
Maximum Duty Ratio Minimum Duty Ratio
PFM Duty Ratio Efficiency (*2) Soft-Start Time EXT1 "High" ON Resistance EXT1 "Low" ON Resistance EXT2 "High" ON Resistance EXT2 "Low" ON Resistance PWM "High" Voltage PWM "Low" Voltage CE "High" Voltage CE "Low" Voltage CE "High" Current CE "Low" Current PWM "High" Current PWM "Low" Current FB "High" Current FB "Low" Current