View XC9106_232396.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

XC9106 / 07 Series
Preliminary
! Externally Applied Reference Voltage (Vref) ! Ceramic Capacitors Compatible ! Input Voltage Range: 0.9V~10.0V ! Oscillation Frequency: 300kHz, 100kHz (15%) ! PWM Control (XC9106) PWM/PFM Automatic Switching Control (XC9107) ! SOT-25 / USP-6B Packages " GENERAL DESCRIPTION
The XC9106 / 07 series are step-up DC/DC controller ICs with an externally applied reference voltage (Vref). Output voltage will be set with external resistors (RFB1 and 2) and Vref value. The series make it easy to control output voltage externally and are suited to software applications that need to vary voltage, such as LCD power supply for PDA. Output will be stable no matter which load capacitors are used but if a low ESR capacitor is used, RSENSE of about 0.1 will be required and phase compensation will be achieved. This makes the use of ceramic capacitors much easier, and allows for lower output ripple and reduced PCB area requirements. Tantalum and electrolytic capacitors can also be used, in which case, RSENSE becomes unnecessary. Oscillation frequencies of high clock, low ripple 300kHz and low supply current 100kHz are available. The XC9107 series are PWM/PFM automatic switching controlled. Control switches from PWM to PFM during light loads with the XC9107 and the series is highly efficient from light loads to large output currents. By bringing the whole circuit down while the series is in the stand-by mode (CE/PWM pin : low), supply current can be reduced to less than 1.0A.
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
June 26, 2003 Ver. 2
" APPLICATIONS
# Power Supply for LCD # PDAs # Cellular Phones # Palmtop Computers # Portable Audio Systems # Various Multi-function Power Supplies
" FEATURES
Input Voltage Range: Power Supply Voltage Range: VREF Input Range: Output Voltage: Oscillation Frequency: Output Current: 0.9V ~ 10.0V 1.8V ~ 10.0V and more than Vref+0.7V 0.8V ~ 2.5V (2.0%) Vref x external split resistor ratio VOUT=Vref x (RFB1+RFB2)/RFB2 300kHz, 100kHz 15% more than 30mA (VIN=3.3V, VOUT=20V, when peripheral components are used as in the circuits below .)
Controls: High Efficiency: Stand-by Current: Load Capacitors: Packages:
PWM (XC9106) PWM/PFM auto-switching (XC9107) 85% (TYP.) ISTB=1.0A (MAX.) Low ESR capacitors compatible SOT-25, USP-6B
" TYPICAL APPLICATION CIRCUIT
" TYPICAL APPLICATION PERFORMANCE
XC9107D003MR 30 L : 10H VOUT (V) 25 20 15 10 5 0 CIN VIN = 3.3V 0.0 0.5 1.0 1.5 2.0 Vref (V) 2.5 3.0 Circuit as left VDD=VIN=3.3V, IOUT=30mA
RSENSE : 100m for Ceramic CL SD : MA737 * CFB : 27pF VOUT = 8V~25V RFB1 : IOUT = 30mA 270k RFB2 : 30k
Ceramic CL : 10F
1 2 3 CE/Vref
5
Nch Power MOS FET 2SK2159
XC9107D003MR 30 25
Circuit as left VDD=VIN=3.3V
4 VOUT (V)
0.8V~2.5V D/A converter
2.5V 20 15 10 5 0 0.1 1 10 100 IOUT (mA) 1000
Semiconductor Ltd.
2.0V 1.5V Vref=0.8V
* RSENSE is of no use in light load (uncontinuous mode) applications such as a small LCD, even using ceramic capacitor.
1
XC9106 / 07 Series
Preliminary
" PIN CONFIGURATION
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
" PIN ASSIGNMENT
PIN NUMBER SOT-25 USP-6B PIN NAME FB VDD CE/ Vref GND EXT NC FUNCTION Output Resistor Connection Supply Voltage Serves as both Chip Enable pin and Reference Voltage Apply pin. Ground External Transistor Connection No Connection
5
4
1 2 3 6 5 4
1 2 3
6 2 4
1
2
3
4
3 1 5
SOT-25 (TOP VIEW)
USP-6B (TOP VIEW)
5 -
" ORDERING INFORMATION
XC9106D12345
XC9106 Series: PWM Control
XC9107D12345
XC9107 Series: PWM/PFM automatic switching control (Ordering information is the same as XC9106 Series)
12 3 4 5
3 1 M D R L
Reference Voltage (apply external) Fixed : 00 Oscillation Frequency: Package: 300kHz 100kHz SOT-25 (1 reel = 3000 pcs.) USP-6B (1 reel = 3000 pcs.) Embossed Tape: Standard Feed Reverse Feed
" PACKAGING INFORMATION
$ SOT-25 (SOT-23-5) $ USP-6B
2.0 + 0.15 (0.45) 0.5+0.1 (0.05)
0.45)
1 2 3
6 5
1.8+0.15
(0.45) (0.45)
(0.125)
45O
0.005+0.002
45
O
(0.27)
45 O
4
(0.27)
(
45
A
(0.27)
1
A'
O
(0.65)+0.15 -0.05
1
0.7+0.03
5-0.2+0.05
3 2
4 5
00.1+0.03
0.2+0.05
1
6
1
1
1
1.0+0.1 0.25+0.1
.
0.25+0.1
1
0.5+0.1 0.5+0.1
1.6+0.15
2
Semiconductor Ltd.
(0.05) -0.005
+0.01
AAA AAA
XC9106 / 07 Series
Preliminary
" BLOCK DIAGRAM
Current Ripple Detect and FB Phase Compensation
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
FB
VDD
PWM Comparator Error Amp. Vref with Soft Start, CE CE / Vref PWM/PFM Controller Ramp Wave Generator, OSC
Buffer, Driver
EXT
GND
FB, CE : CMOS INPUT EXT : CMOS OUTPUT
" ABSOLUTE MAXIMUM RATINGS Ta = 25OC
PARAMETER VDD pin Voltage FB pin Voltage CE / Vref pin Voltage EXT pin Voltage EXT pin Current Power Dissipation Operating Ambient Temperature Storage Temperature Pd SYMBOL VDD VFB VCE / Vref VEXT IEXT/ SOT-25
USP-6B
RATINGS -0.3 ~ 12.0 -0.3 ~ 12.0 -0.3 ~ 12.0 -0.3 ~ VDD + 0.3 100 150 100 -40 ~ +85 -55 ~ +125
UNITS V V V V mA mW
O O
Topr Tstg
C C
3
Semiconductor Ltd.
XC9106 / 07 Series
Preliminary
" ELECTRICAL CHARACTERISTICS
XC9106D001MR, XC9107D001MR PARAMETER Output Voltage Reference Voltage Range FB Control Voltage SYMBOL VOUT Vref Vref = 0.9V VFB Vref = 0.9V Vref = 2.5V *1 *1 Power Supply Voltage Range Operation Start Voltage Oscillation Start Voltage Operation Holding Voltage Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency Maximum Duty Ratio PFM Duty Ratio Efficiency Soft-start Time CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance CE "High" Current CE "Low" Current FB "High" Current FB "Low" Current VDD = VIN = 3.30 3.30 VDD VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY EFFI TSS VCEH VCEL REXTH REXTL ICEH ICEL IFBH IFBL Vref = 0.9V CONDITIONS
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=100 (kHz) MIN. 8.820 0.8 0.784 0.882 2.450 1.8 0.800 0.900 2.500 TYP. 9.000 MAX. 9.180 2.5 0.816 0.918 2.550 10.0 0.9 0.8 0.7 29 14 85 75 (XC9106 series) 20 5.0 0.65 0.20 24 16 -1.0 0.0 36 24 0.0 2.5 -0.1 0.1 -0.1 RFB1, 2 x 10 A A A 100 81 28 85 10.0 20.0 41 19 1.0 115 87 36 V V V V A A A KHz % % % mS V V A V V V
Ta=25OC UNITS CIRCUIT
1 4 3 4 3 4 4 5 4 4 1 1 1 5 5 4 4 5 5 5 5
VDD as shown right or (Vref applied voltage+0.7V) Recommended Circuit using 2SD1628, IOUT=1.0mA No external connections CE/Vref=0.9V, Voltage applied, FB=0V Recommended Circuit using 2SD1628, IOUT=1.0mA Same as VST2, VDD=3.300V Same as IDD1, FB=1.2V Same as IDD1, CE/Vref=0V Same as IDD1 Same as IDD1 No Load Vref=0.9V Same as IDD1 Same as IDD1 Same as IDD1, VEXT=VOUT-0.4V Same as IDD1, VEXT=0.4V Same as IDD2, CE=0.8V Same as IDD2, CE=2.5V Same as IDD2, CE=0V Same as IDD2, FB=VDD Same as IDD2, FB=1.0V 0.09 50 (V) , (mA) Recommended Circuit using XP161A1355
Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOS FET should be connected. (V) ! Vref = (V) ! IOUT =
Notes 1* : Although the IC starts step-up operations from a VDD of 0.8V, the output voltage and oscillation frequency are stabilized at VDD 1.8V or (Vref applied voltage + 0.7V). Therefore, a VDD of more than 1.8V or (Vref applied voltage + 0.7V) is recommended when VDD is supplied from VIN or other power sources.
4
Semiconductor Ltd.
XC9106 / 07 Series
Preliminary
" ELECTRICAL CHARACTERISTICS
XC9106D003MR, XC9107D003MR PARAMETER Output Voltage Reference Voltage Range FB Control Voltage SYMBOL VOUT Vref Vref = 0.8V VFB Vref = 0.9V Vref = 2.5V *1 *1 Power Supply Voltage Range Operation Start Voltage Oscillation Start Voltage Operation Holding Voltage Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency Maximum Duty Ratio PFM Duty Ratio Efficiency Soft-start Time CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance CE "High" Current CE "Low" Current FB "High" Current FB "Low" Current VDD = VIN = 3.30 3.30 VDD VST1 VST2 VHLD IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY EFFI TSS VCEH VCEL REXTH REXTL ICEH ICEL IFBH IFBL Vref = 0.9V CONDITIONS
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=300 (kHz) MIN. 8.820 0.8 0.784 0.882 2.450 1.8 0.800 0.900 2.500 TYP. 9.000 MAX. 9.180 2.5 0.816 0.918 2.500 10.0 0.9 0.8 0.7 62 16 255 75 (XC9106 series) 24 5.0 0.65 0.20 24 16 -1.0 0.0 36 24 0.0 2.5 -0.1 0.1 -0.1 RFB1, 2 x 10 A A A 300 81 32 85 10.0 20.0 88 22 1.0 345 87 40 V V V V A A A KHz % % % mS V V A V V V
Ta=25OC UNITS CIRCUIT
1 4 3 4 3 4 4 5 4 4 1 1 1 5 5 4 4 5 5 5 5
VDD as shown right or (Vref applied voltage + 0.7V) Recommended Circuit using 2SD1628, IOUT=1.0mA No external connections CE/Vref=0.9V, Voltage applied, FB=0V Recommended Circuit using 2SD1628, IOUT=1.0mA Same as VST2, VDD=3.300V Same as IDD1, FB=1.2V Same as IDD1, CE/Vref=0V Same as IDD1 Same as IDD1 No Load Vref=0.9V Same as IDD1 Same as IDD1 Same as IDD1, VEXT=VOUT-0.4V Same as IDD1, VEXT=0.4V Same as IDD2, CE=0.8V Same as IDD2, CE=2.5V Same as IDD2, CE=0V Same as IDD2, FB=VDD Same as IDD2, FB=1.0V 0.09 50 (V) , (mA) Recommended Circuit using XP161A1355
Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOS FET should be connected. (V) ! Vref = (V) ! IOUT =
Notes 1* : Although the IC starts step-up operations from a VDD of 0.8V, the output voltage and oscillation frequency are stabilized at VDD 1.8V or (Vref applied voltage + 0.7V). Therefore, a VDD of more than 1.8V or (Vref applied voltage + 0.7V) is recommended when VDD is supplied from VIN or other power sources.
" TYPICAL APPLICATION CIRCUIT
RSENSE SD VOUT RFB1 CFB RFB2 1 CL 2 3 CE/Vref 4 5 Nch Power MOS FET Cb Rb L VIN
When obtaining VDD from a source other than VOUT, please insert a capacitor CDD between the VDD pin and the GND pin in order to provide stabler operations. Please wire CL & CIN between the VOUT/VDD pin and the GND pin. Strengthen the wiring sufficiently. When using a capacitor other than ceramic or low ESR at CL, please take away RSENSE and short.
Insert Rb and CB when using a bipolar NPN Transistor.
5
Semiconductor Ltd.
XC9106 / 07 Series
Preliminary
" OPERATIONAL DESCRIPTION
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
The XC9106 / 07 series are reference voltage (Vref) apply external step-up DC/DC Controler ICs. Output voltage will be set with external resistors (RFB1 and 2) and Vref value. The series make it easy to control output voltage externally and are suited to software applications that need to vary voltage such as LCD power supply for PDA.

Error Amplifier is designed to monitor the output voltage, comparing the feedback voltage (FB) with the reference voltage Vref. In response to feedback of a voltage lower than the reference voltage Vref, the output voltage of the error amp. decreases.

This circuit generates the internal reference clock.

The Ramp Wave Generator generates a saw-tooth waveform based on outputs from the OSC Generator.

The PWM Comparator compares outputs from the Error Amp. and saw-tooth waveform. When the voltage from the Error Amp's output is low, the external switch will be set to ON.

This circuit generates PFM pulses. The PWM/PFM automatic switching mode switches between PWM and PFM automatically depending on the load. PWM/PFM control turns into PFM control when threshold voltage becomes lower than voltage of error amps. Noise is easily reduced with PWM control since the switching frequency is fixed. Because of the function, control suited to the application can easily be selected. The series suitable for noise sensitive portable audio equipment as PWM control can suppress noise during operation and PWM/PFM switching control can reduce consumption current during light loads in stand-by.

The reference voltage of the XC9106/9107 series is adjusted and fixed by external applied voltage. (For output voltage settings, please refer to the output voltage setting on page 7.) To protect against inrush current, when the power is switched on, and also to protect against voltage overshoot, soft-start time is set internally to 10ms. It should be noted, however, that this circuit does not protect the load capacitor (CL) from inrush current. With the Vref voltage limited, and depending upon the input to error amp, the operation maintains a balance between the two inputs of error amps and controls the EXT pin's ON time so that it doesn't increase more than is necessary. The XC9106/9107 series alters soft start times by the setting value of reference voltage in order to protect against voltage overshoot and also to protect against inrush current. Please determine soft start time by the formula equation.
TSS = 8.65 x Vref + 2.21 [Example Computation]
XC9106 / XC9107D xxx MR
30
Soft Start Time : TSS (ms)
Vref = 0.9V, TSS = 8.65 x 0.9 + 2.21 = 10.0 ms
25 20 15 10 5 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0
Reference Voltage Vref (V)
This function controls the operation and shutdown of the IC. When the voltage of the CE pin drops to 0.2V or less, disable mode will be entered, the IC's operations will stop and the EXT pin will be kept at a low level (the external N-type MOSFET will be OFF) . When the IC is in a state of chip disable, current consumption will be no more than 1.0A. When the CE pin's voltage rises to 0.65V or more, enable mode will be entered and operations will recommence. The CE pin also doubles with reference voltage in the XC9106/9107 series, and the range of reference voltage can be varied externally from 0.8V to 2.5V.
6
Semiconductor Ltd. Semiconductor Ltd.
XC9106 / 07 Series
Preliminary
" FUNCTIONAL SETTINGS < Output Voltage Setting>
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of RFB1 and RFB2. The sum of RFB1 and RFB2 should normally be 2 M or less. The range of reference voltage of the series can be varied externally from 0.8V to 2.5V. VOUT = Vref applied voltage x (RFB1 + RFB2) / RFB2 The value of CFB1, speed-up capacitor for phase compensation, should result in fzfb = 1/(2 x CFB x RFB1) equal to 5 to 30kHz. Adjustments are required depending on the application, value of inductance (L), and value of load capacity (CL).
fzfb = 30kHz (L=10H) fzfb = 20kHz (L=22H) fzfb = 10kHz (L=47H)
RFB1 : 270k CFB : 20pF 27pF 56pF
RFB2 : 30k (fzfb = 30kHz, L = 10H) (fzfb = 20kHz, L = 22H) (fzfb = 10kHz, L = 47H)
< The use of ceramic capacitor CL >
The circuit of the XC9106/9107 series is organized by a specialized circuit which reenacts negative feedback of both voltage and current. Also by insertion of approximately 100m of a low and inexpensive sense resistor as current sense, a high degree of stability is possible even using a ceramic capacitor, a condition which used to be difficult to achieve. Compared to a tantalum condenser, because the series can be operated in a very small capacity, it is suited to use of the ceramic capacitor which is cheap and small.
" RECOMMENDED COMPONENTS
Tr: *When a MOSFET is used : 2SK2159 (NEC N-Channel Power MOSFET) Note* : With direct voltages over 4.5V, use the XP161A11A1PR. *When a NPN Tr. Is used : 2SD1628 (Sanyo) Rb Cb : 500 (adjust with Tr's HFE or load) : 2200pF (ceramic type) Cb 1 / (2 x Rbx FOSC x 0.7) SD: L, CL : MA2Q737 (Schottky Diode type, MATSUSHITA) Adjust as below according to the condition and peripheral components When Ceramic capacitor is used : L: CL : 22H (SUMIDA CDRH5D28, FOSC = 100kHz) 10H (SUMIDA CDRH5D18, FOSC = 300kHz) 10V 10F (Ceramic capacitor, LMK325BJ106ML, TAIYOYUDEN) Use the formula below when step-up ratio and output current is large. CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN) RSENSE : 100m 50m (FOSC = 300kHz) (FOSC = 100kHz)
When Tantalum capacitor is used : L: 22H (SUMIDA CDRH5D28, FOSC = 300kHz) 47H (SUMIDA CDRH5D28, FOSC = 100kHz) Except when IOUT(mA) / 100mA x VOUT / VIN > 2 22H CL: 16V 47F (tantalum type NIPPONCHEMI 16MCE476MD2) Use the formula below when step-up ratio and output current is large. CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN) RSENSE: Not required, but short out the wire.
When AL Electrolytic capacitor is used : L: 22H (SUMIDA CDRH5D28, FOSC = 300kHz) 47H (SUMIDA CDRH5D28, FOSC = 100kHz) Except when IOUT(mA) / 100mA x VOUT / VIN > 2 22H CL: RSENSE: CFB: 16V 100F (AL electrolytic type) + 10V 2.2F (ceramic type) Strengthen appropriately when step-up ratio and output current is large. Not required, but short out the wire. Set up so that fzfb = 100kHz.
7
Semiconductor Ltd.
XC9106 / 07 Series
Preliminary
" TEST CIRCUITS
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Circuit
1
SD L A Tr OSC EXT CIN CE GND VDD FB RFB2 RL CFB RFB1 CL V A RSENSE VOUT
Circuit
4
RP CP
OSC EXT CE GND VDD FB CDD A
VIN
Circuit
2
A
Circuit
5
EXT VDD FB GND A A
SD L A Tr VIN CIN RB CE GND CB OSC EXT VDD FB
A
RSENSE CFB
C CE E
RFB1 CL
A
V
RFB2 RL
Circuit
3
SD L A Tr CB OSC EXT CIN RB CE GND VDD FB RFB2 RL RSENSE CFB
RFB1 CL
A V
VIN
8
Semiconductor Ltd.

▲Up To Search▲

Price & Availability of XC9106

	To Download XC9106 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .