TOREX XC9509C036AL

XC9509 Series
ETR1006_001
Synchronous Step-Down DC/DC Converter
with Built-In LDO Regulator in Parallel Plus Voltage Detector
■GENERAL DESCRIPTION
The XC9509 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in parallel with the
DC/DC converter's output. A voltage detector is also built-in. Since the input for the LDO voltage regulator block comes
from the input power supply, it is suited for use with various applications.
The DC/DC converter block incorporates a P-channel driver transistor and a synchronous N-channel switching transistor.
With an external coil, diode and two capacitors, the XC9509 can deliver output currents up to 600mA at efficiencies over 90%.
The XC9509 is designed for use with small ceramic capacitors.
A choice of three switching frequencies are available, 300kHz, 600kHz, and 1.2MHz. Output voltage settings for the DC/DC
and VR are set-up internally in 100mV steps within the range of 0.9V to 4.0V (± 2.0%). For the VD, the range is of 0.9V to
5.0V (± 2.0%). The soft start time of the series is internally set to 5ms. With the built-in U.V.L.O. (Under Voltage Lock Out)
function, the internal P-channel driver transistor is forced OFF when input voltage becomes 1.4 V or lower. The functions of
the MODE pin can be selected via the external control pin to switch the DC/DC control mode and the disable pin to shut down
either the DC/DC block or the regulator block.
■APPLICATIONS
●CD-R / RW, DVD
●HDD
■FEATURES
Input Voltage Range
Low ESR Capacitor
VD Function
●PDAs, portable communication modem
: 2.4V ~ 6.0V
: Ceramic capacitor compatible
: Sense internally either VDD, DCOUT,
or VROUT. N-ch open drain output
: MSOP-10, USP-10
●Cellular phones
Small Package
●Palmtop computers
<DC/DC Converter Block>
Output Voltage Range : 0.9V ~ 4.0V (Accuracy±2%)
Output Current
: 600mA (for MSOP-10 package)
400mA (for USP-10 package)
Control Method
: PWM or PWM/PFM Selectable
Oscillation Frequency : 300kHz, 600kHz, 1.2MHz
●Cameras, video recorders
<Regulator Block>
Reglator Output
: Parallel Input to DC/DC Converter
Output Voltage Range : 0.9V ~ 4.0V (Accuracy±2%)
Current Limit
: 300mA
Dropout Voltage
: 80mV @ IOUT=100mA (VOUT=2.8V)
High Ripple Rejection : 60dB @1kHz (VOUT=2.8V)
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE
CHARACTERISTICS
XC9509Hxxxx
VIN=3.6V, Topr=25℃, L=4.7μH (CDRH4D28C),
CIN:4.7μF (ceramic), CL1:10μF (ceramic), CL2: 4.7μF (ceramic)
MSOP-10 (TOP VIEW)
* Please refer to the typical application circuit when
external components are selected.
1/41
XC9509 Series
■PIN CONFIGURATION
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTION
1
2
3
4
5
6
7
8
PGND
CE
PVDD
AVDD
VDOUT
AGND
MODE
VROUT
Power Ground
Chip Enable
Power Supply 1
Power Supply 2
VD Input
Analog Ground
Mode Switch
VR Output
9
10
DCOUT
LX
DC/DC Output Sense
Switch
MSOP-10 (TOP VIEW)
USP-10 (BOTTOM VIEW)
*The dissipation pad for the USP-10 package
should be solder-plated in recommended
mount pattern and metal masking so as to
enhance mounting strength and heat release.
If the pad needs to be connected to other pins,
it should be connected to the AGND pin.
■PRODUCT CLASSIFICATION
●Ordering Information
XC9509①②③④⑤⑥
DESIGNATOR
:
The input for the voltage regulator block comes from VDD.
DESCRIPTION
Control Methods, the
MODE Pin, & the VD
Sense Pin
Setting Voltage &
Specifications
①
②③
④
DC/DC Oscillation
Frequency
⑤
Package &
DC/DC Current Limit
⑥
Device Orientation
SYMBOL
DESCRIPTION
As chart below
Internal
standard
3
6
C
A
D
R
L
:: Setting voltage and specifications of each DC/DC, VR,
and VD (Based on the internal standard)
: 300kHz
: 600kHz
: 1.2MHz
: MSOP-10, Current limiter: 1.1A (TYP.)
: USP-10, Current limiter: 0.7A (TYP.)
: Embossed Tape, standard feed
: Embossed Tape, reverse feed
●Control Methods, MODE Pins, VD SENSE Pins
SERIES
①
DC/DC CONTROL METHODS
MODE PINS
(H LEVEL)
MODE PINS
(L LEVEL)
A
VDD
VR: OFF
B
C
D
XC9509
VR: ON
VDD
DC/DC: OFF
DC/DC: ON
F
K
DCOUT
VROUT
PWM, PFM/PWM Manual
Switch
PFM/PWM Auto
Switch
VDD
PWM Control
L
* The XC9509A to F series' MODE pin switches either the regulator block or DC/DC block to stand-by mode.
When the CE mode is off, every function except for the VD function enters into the stand-by mode.
(The MODE pin does not operate independently.)
2/41
DCOUT
VROUT
PWM Control
E
H
VD SENSE
DCOUT
VROUT
XC9509
Series
■BLOCK DIAGRAM
DCOUT
PVDD
Phase
Compensation
-
+
+
V ref w ith
sof t start
ON/OFF
Control
CE
-
logic
Buf f er,
Driver
Current
Limit & Feedback
PW M/ PFM
Controller
LX
Ramp Wave
Generator,
OSC
each circuit
PGND
MODE
Control
each circuit
MODE
AVDD
VROUT
U.V .L.O
-
Current
Limit
+
+
VDOUT
+
Vref
Vref
S ENS E
(V DD or DCOUT or V ROUT)
-
AGND
* Diodes shown in the above circuit are protective diodes.
■ABSOLUTE MAXIMUM RATINGS
PARAMETER
AVDD Pin Voltage
PVDD Pin Voltage
DCOUT Pin Voltage
VROUT Pin Voltage
VROUT Pin Current
VDOUT Pin Voltage
VDOUT Pin Current
Lx Pin Voltage
MSOP-10
Lx Pin Current
USP-10
CE Pin Voltage
MODE Pin Voltage
MSOP-10
Power Dissipation
USP-10
Operating Temperature Range
Storage Temperature Range
Ta = 25℃
SYMBOL
RATINGS
UNIT
AVDD
PVDD
DCOUT
VROUT
IROUT
VDOUT
IVD
Lx
- 0.3 ~ 6.5
AVDD - 0.3 ~ AVDD + 0.3
- 0.3 ~ AVDD + 0.3
- 0.3 ~ AVDD + 0.3
800
- 0.3 ~ AVDD + 0.3
50
- 0.3 ~ AVDD + 0.3
1300
900
- 0.3 ~ AVDD + 0.3
- 0.3 ~ AVDD + 0.3
350 (*)
150
- 40 ~ + 85
- 55 ~ + 125
V
V
V
V
mA
V
mA
V
ILx
CE
MODE
Pd
Topr
Tstg
mA
V
V
mW
℃
℃
(*) When PC board mounted.
3/41
XC9509 Series
■ELECTRICAL CHARACTERISTICS
XC9509xxxCAx
●Common Characteristics
Topr=25℃
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
Supply Current 1
IDD1
Supply Current 2
IDD2
Stand-by Current (*1)
ISTB
VIN=6.5V, CE=0V
Input Voltage Range
VIN
CE ‘H’ Level Voltage
CE ‘L’ Level Voltage
UNITS
VIN=CE=DCOUT=5.0V
-
250
310
μA
1
VIN=CE=5.0V, DCOUT=0V
-
300
360
μA
1
CIRCUIT
-
3.0
7.0
μA
1
2.4
-
6.0
V
-
VCEH
0.6
-
VDD
V
3
VCEL
VSS
-
0.25
V
3
CE ‘H’ Level Current
ICEH
- 0.1
-
0.1
μA
1
CE ‘L’ Level Current
MODE 'H' Level Voltage
*XC9509A/B/C
MODE 'H' Level Voltage
*XC9509D/E/F/H/K/L
MODE 'L' Level Voltage
*XC9509A/B/C
MODE 'L' Level Voltage
*XC9509D/E/F/H/K/L
MODE 'H' Level Current
ICEL
- 0.1
-
0.1
μA
1
VMH
0.6
-
VDD
V
2
VMH
0.6
-
VDD
V
3
VML
VSS
-
0.25
V
2
VML
VSS
-
0.25
V
3
MODE 'L' Level Current
IMH
- 0.1
-
0.1
μA
1
IML
- 0.1
-
0.1
μA
1
MIN.
TYP.
MAX.
UNITS
●DC/DC Converter (1.5V product)
Topr=25℃
PARAMETER
SYMBOL
CONDITIONS
Supply Current 1 *XC9509A/B/C
IDD_DC1
VIN=CE=DCOUT=5.0V
200
280
μA
1
Supply Current 2 *XC9509A/B/C
PFM Supply Current 1 *
XC9509H/K/L
PFM Supply Current 2
* XC9509H/K/L
IDD_DC2
VIN=CE=5.0V, DCOUT=0V
250
330
μA
1
IDD_PFM1
VIN=CE=DCOUT=5.0V
250
310
μA
1
IDD_PFM2
VIN=CE=5.0V, DCOUT=0V
300
360
μA
1
1.470
1.500
1.530
V
3
1.02
1.20
1.38
MHz
3
Connected to the external components,
-
CIRCUIT
Output Voltage
DCOUT(E)
Oscillation Frequency
FOSC
Maximum Duty Ratio
MAXDUTY
DCOUT=0V
100
-
-
%
4
Minimum Duty Ratio
MINDUTY
DCOUT=VIN
-
-
0
%
4
21
30
38
%
3
1.00
1.40
1.78
V
3
-
0.5
1.0
Ω
5
-
0.5
0.9
Ω
3
PFM Duty Ratio
*XC9509H/K/L
PFMDUTY
IDOUT=30mA
Connected to the external components,
IDOUT=10mA
Connected to the external components,
No load
U.V.L.O. Voltage (*2)
VUVLO
LX SW ‘High’ ON Resistance (*3)
RLXH
LX SW ‘Low’ ON Resistance
RLXL
LX SW ‘High’ Leak Current (*12)
IleakH
VIN=LX=6.0V, CE=0V
-
0.05
1.00
μA
11
LX SW ‘Low’ Leak Current (*12)
IleakL
VIN=6.0V, LX=CE=0V
-
0.05
1.00
μA
11
Maximum Output Current
Imax1
Connected to the external components
600
-
-
mA
3
Current Limit (*9)
Ilim1
1.0
1.1
-
A
6
-
90
-
%
3
-
+100
-
2
5
10
ms
3
-
8
25
ms
10
Efficiency (*4)
EFFI
Output Voltage
U DCOUT
Temperature Characteristics
4/41
Connected to the external components
DCOUT=0V, LX=VIN-0.05V
Connected to the external components,
VIN=5.0V
Connected to the external components,
IDOUT=100mA
IDOUT=30mA
(UTopr・DCOUT) -40℃<Topr<85℃
Soft-Start Time
TSS
Latch Time (*5, 10)
Tlat
Connected to the external components,
CE=0V VIN, IDOUT=1mA
Connected to the external components,
VIN=CE=5.0V, Short DCOUT by 1Ω resistor
ppm/
℃
3
XC9509
Series
■ELECTRICAL CHARACTERISTICS (Continued)
XC9509xxxCAx (Continued)
●Regulator (3.3V product)
PARAMETER
Topr=25℃
SYMBOL
Supply Current * XC9509H/K/L
IDD_VR
Output Voltage
VROUT(E)
CONDITIONS
IROUT=30mA
MIN.
TYP.
MAX.
UNITS
CIRCUIT
-
40
80
μA
1
3.234
3.300
3.366
V
2
Maximum Output Current
Imax2
Load Regulation
U VROUT
Dropout Voltage 1 (*6)
Vdif 1
IROUT=30mA
-
20
50
mV
2
Dropout Voltage 2
Vdif 2
IROUT=100mA
-
60
110
mV
2
U VROUT
IROUT=30mA
-
0.05
0.25
%/V
2
240
300
-
mA
7
-
30
-
mA
7
-
60
-
dB
12
-
±100
-
MIN.
TYP.
MAX.
2.646
2.700
2
5
Line Regulation
(UVIN・VROUT) 4.3V<VIN<6.0V
Current Limit
Ilim2
Short-Circuit Current
Ishort
Ripple Rejection Rate
PSRR
Output Voltage
U VROUT
Temperature Characteristics
1mA<IROUT<100mA
VROUT=VROUT(E) x 0.9
VROUT=VSS
VIN=4.3VDC+0.5Vp-pAC,
IROUT=30mA, f=1kHz
IROUT=30mA
(UTopr・VROUT) -40 C<Topr<85℃
O
200
-
-
mA
2
-
15
50
mV
2
ppm/
2
℃
●Detector (2.7V product)
PARAMETER
SYMBOL
Detect Voltage
VDF(E)
CE=0V
Hysteresis Range
VHYS
VHYS=[VDR(E) (*11) - VDF(E)] / VDF(E) x 100
Output Current
* XC9509A/D/H
Output Current
* XC9509B/C/E/F/K/L
CONDITIONS
UNITS
CIRCUIT
2.754
V
8
8
%
8
IVD
VIN=2.4V, VDOUT=0.5V, CE=0V
0.5
-
-
mA
9
IVD
VIN=2.4V, VDOUT=0.5V, CE=0V
1.0
-
-
mA
9
-
±100
-
Output Voltage
U VDF
Temperature Characteristics
(UTopr・VDF)
-40OC<Topr<85℃
ppm/
℃
8
Test conditions: Unless otherwise stated:
DC/DC : VIN=3.6V [@ DCOUT:1.5V]
VR: VIN = 4.3V (VIN=VROUT(T) + 1.0V)
VD: VIN=5.0V
Common conditions for all test items: CE=VIN, MODE=0V
●VROUT(T) : Setting Output Voltage
NOTE:
*1 : Including VD supply current (VD operates when in stand-by mode.)
*2 : Including hysteresis operating voltage range.
*3 : ON resistance (Ω)= 0.05 (V) / ILX (A)
*4 : EFFI = { ( output voltage x output current ) / ( input voltage x input current) } x 100
*5 : Time until it short-circuits DCOUT with GND through 1Ωof resistance from a state of operation and is set to DCOUT=0V from
current limit pulse generating.
*6 : Vdif = (VIN1 (*7) - VROUT1 (*8) )
*7 : VIN 1 = The input voltage when VROUT1 appears as input voltage is gradually decreased.
*8 : VROUT1 = A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {VROUT(T) + 1.0V} is input.
*9 : Current limit = When VIN is low, limit current may not be reached because of voltage falls caused by ON resistance or
serial resistance of coils.
*10: Integral latch circuit=latch time may become longer and latch operation may not work when VIN is 3.0V or more.
*11: VDR(E) = VD release voltage
*12: When temperature is high, a current of approximately 5.0μA (maximum) may leak.
*13: When using the IC with a regulator output at almost no load, a capacitor should be placed as close as possible between
AVDD and AGND (CIN2), connected with low impedance. Please also see the recommended pattern layout for your
reference. Should it not be possible to place the input capacitor nearby, the regulated output level may increase up to
the VDD level while the load of the DC/DC converter increases and the regulator output is at almost no load.
5/41
XC9509 Series
■TEST CIRCUITS
Circuit 1
Supply Current, Stand-by Current, CE Current,
MODE Current
Circuit 3 Output Voltage (DC/DC), Oscillation Frequency, U.V.L.O.
Circuit 2
Output Voltage (VR), Load Regulation, Dropout Voltage,
Maximum Output Current, (MODE Voltage)
Circuit 4 Minimum Duty Cycle, Maximum Duty Cycle
Voltage, Soft-start Time, CE Voltage, Maximum Output
Current, Efficiency, (PFM Duty Cycle), (MODE Voltage)
Circuit 5 Lx ON Resistance
6/41
Circuit 6 Current Limit 1 (DC/DC)
XC9509
Series
■TEST CIRCUITS (Continued)
Circuit 7
Current Limit 2 (VR), Short Circuit Current (VR)
Circuit 8
Detect Voltage, Release Voltage (Hysteresis Range)
* For the measurement of the VDD_Sense products,
the input voltage was controlled.
Circuit 9
VD Output Current
Circuit 10
Latch Time
Circuit 12
Ripple Rejection Rate
* For the measurement of the VDD_Sense products,
the input voltage was controlled.
Circuit 11
Off-Leak
7/41
XC9509 Series
■TYPICAL APPLICATION CIRCUIT
FOSC
L
1.2MHz
600kHz
300kHz
4.7μH
(CDRH4D28C, SUMIDA)
10μH
(CDRH5D28, SUMIDA)
22μH
(CDRH6D28, SUMIDA)
MSOP-10 (TOP VIEW)
CIN
CL1
4.7μF
(ceramic, TAIYO YUDEN)
10μF
(ceramic, TAIYO YUDEN)
CL2 (*2)
VROUT<2.0V
VROUT>2.0V
4.7μF (ceramic, TAIYO YUDEN)
Vdif>1.0V
1.0μF (ceramic, TAIYO YUDEN)
Vdif<1.0V
4.7μF (ceramic, TAIYO YUDEN)
SD *1 : XB0ASB03A1BR (TOREX)
*1 The DC/DC converter of the XC9508 series automatically switches between synchronous / non-synchronous. The Schottky diode is
not normally needed.
However, in cases where high efficiency is required when using the DC/DC converter during in the light load
while in non-synchronous operation, please connect a Schottky diode externally.
*2 Please be noted that the recommend value above of the CL2 may be changed depending on the input voltage value and setting voltage
value.
■OPERATIONAL EXPLANATION
The XC9509 series consists of a synchronous step-down DC/DC converter, a high speed LDO voltage regulator, and a
voltage detector.
●DC/DC Converter
The series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase
compensation circuit, output voltage adjustment resistors, driver transistor, synchronous switch, current limiter circuit,
U.V.L.O. circuit and others. The series ICs compare, using the error amplifier, the voltage of the internal voltage
reference source with the feedback voltage from the VOUT pin through split resistors. Phase compensation is
performed on the resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time
during PWM operation. The PWM comparator compares, in terms of voltage level, the signal from the error amplifier
with the ramp wave from the ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the
Lx pin to output a switching duty cycle. This process is continuously performed to ensure stable output voltage. The
current feedback circuit monitors the P-channel MOS driver transistor current for each switching operation, and
modulates the error amplifier output signal to provide multiple feedback signals. This enables a stable feedback loop
even when a low ESR capacitor, such as a ceramic capacitor, is used, ensuring stable output voltage.
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.
<Ramp Wave Circuit>
The ramp wave circuit determines switching frequency. The frequency is fixed internally and can be selected from
300kHz, 600 kHz and 1.2 MHz. Clock pulses generated in this circuit are used to produce ramp waveforms needed for
PWM operation, and to synchronize all the internal circuits.
<Error Amplifier>
The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the
feedback voltage divided by the internal split resistors. When a voltage lower than the reference voltage is fed back,
the output voltage of the error amplifier increases. The gain and frequency characteristics of the error amplifier output
are fixed internally to deliver an optimized signal to the mixer.
8/41
XC9509
Series
■OPERATIONAL EXPLANATION (Continued)
●DC/DC Converter (Continued)
<PWM/PFM>
The PWM control of the XC9509A to F series are controlled on a specified frequency from light loads through the heavy
loads. Since the frequency is specified, the composition of a noise filter etc. becomes easy. However, the efficiency at
the time of the light load may become low. The XC9509H to L series can switch in any timing between PWM control
and PWM/PFM automatic switching control. The series cannot control only PFM mode. If needed, the operation can
be set on a specified frequency; therefore, the control of the noise etc. is possible and the high efficiency at the time of
the light load during PFM control mode is possible. With the automatic PWM/PFM switching control function, the series
ICs are automatically switched from PWM control to PFM control mode under light load conditions. If during light load
conditions the coil current becomes discontinuous and on-time rate falls lower than 30%, the PFM circuit operates to
output a pulse with 30% of a fixed on-time rate from the Lx pin. During PFM operation with this fixed on-time rate,
pulses are generated at different frequencies according to conditions of the moment. This causes a reduction in the
number of switching operations per unit of time, resulting in efficiency improvement under light load conditions.
However, since pulse output frequency is not constant, consideration should be given if a noise filter or the like is
needed. Necessary conditions for switching to PFM operation depend on input voltage, load current, coil value and
other factors.
<Synchronous / Non-synchronous>
The XC9509 series automatically switches between synchronous / non-synchronous according to the state of the DC/DC
converter. Highly efficient operations are achievable using the synchronous mode while the coil current is in a
continuous state. The series enters non-synchronous operation when the built-in N-ch switching transistor for
synchronous operation is shutdown, which happens when the load current becomes low and the operation changes to a
discontinuous state. The IC can operate without an external schottky diode because the parasitic diode in the N-ch
switching transistor provides the circuit's step-down operation. However, since Vf of the parasitic diode is a high 0.6V,
the efficiency level during non-synchronous operation shows a slight decrease.
Please use an external schottky diode
if high efficiency is required during light load current.
●Continuous Mode: Synchronous
●Discontinuous Mode: Non-Synchronous
9/41
XC9509 Series
■OPERATIONAL EXPLANATION (Continued)
●DC/DC Converter (Continued)
<Current Limit>
The current limiter circuit of the XC9509 series monitors the current flowing through the P-channel MOS driver transistor
connected to the Lx pin, and features a combination of the constant-current type current limit mode and the operation
suspension mode..
① When the driver current is greater than a specific level, the constant-current type current limit function operates to
turn off the pulses from the Lx pin at any given timing.
② When the driver transistor is turned off, the limiter circuit is then released from the current limit detection state.
③ At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of
an over current state.
④ When the over current state is eliminated, the IC resumes its normal operation.
The IC waits for the over current state to end by repeating the steps ① through ③. If an over current state continues
for 8msec* and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state
of the driver transistor, and goes into operation suspension mode.
Once the IC is in suspension mode, operations can
be resumed by either turning the IC off via the CE pin, or by restoring power to the VIN pin. The suspension mode does
not mean a complete shutdown, but a state in which pulse output is suspended; therefore, the internal circuitry remains
in operation. The constant-current type current limit of the XC9509 series can be set at 1.1A for MSOP-10 package
and 0.7A for USP-10 package.
*
*
<U.V.L.O. Circuit>
When the VIN pin voltage becomes 1.4 V or lower, the P-channel output driver transistor is forced OFF to prevent false
pulse output caused by unstable operation of the internal circuitry. When the VIN pin voltage becomes 1.8 V or higher,
switching operation takes place. By releasing the U.V.L.O. function, the IC performs the soft start function to initiate
output startup operation. The soft start function operates even when the VIN pin voltage falls momentarily below the
U.V.L.O. operating voltage. The U.V.L.O. circuit does not cause a complete shutdown of the IC, but causes pulse
output to be suspended; therefore, the internal circuitry remains in operation.
●High Speed LDO Voltage Regulator
The voltage regulator block of the XC9509 series consists of a reference voltage source, error amplifier, and current
limiter circuit. The voltage divided by split resistors is compared with the internal reference voltage by the error
amplifier. The P-channel MOSFET, which is connected to the VROUT pin, is then driven by the subsequent output
signal. The output voltage at the VROUT pin is controlled and stabilized by a system of negative feedback. A stable
output voltage is achievable even if used with low ESR capacitors as a phase compensation circuit is built-in.
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the regulator.
<Error Amplifier>
The error amplifier compares the reference voltage with the signal from VROUT, and the amplifier controls the output of
the Pch driver transistor.
<Current Limit Circuit>
The voltage regulator block includes a combination of a constant current limiter circuit and a foldback circuit. The
voltage regulator senses output current of the built-in P channel output driver transistor inside. When the load current
reaches the current limit level, the current limiter circuit operates and the output voltage of the voltage regulator block
drops. As a result of this drop in output voltage, the foldback circuit operates, output voltage drops further and the load
current decreases. When the VROUT and GND pin are shorted, the load current of about 30mA flows.
10/41
XC9509
Series
■OPERATIONAL EXPLANATION (Continued)
●Voltage Detector
The detector block of the XC9509 series detects output voltage from the VDOUT pin while sensing either VDD, DCOUT, or
VROUT internally.
(N-channel Open Drain Type)
<CE Pin Function>
The operation of the XC9509 series' DC/DC converter block and voltage regulator block will enter into the shut down
mode when a low level signal is input to the CE pin. During the shut down mode, the current consumption occurs only
in the detector and is 3.0μA (TYP.), with a state of high impedance at the Lx pin and the DCOUT pin. The IC starts its
operation by inputting a high level signal to the CE pin. The input to the CE pin is a CMOS input and the sink current is
0μA (TYP.).
<MODE Pin Function>
The operation of the XC9509A to C series' voltage detector block will enter into stand-by mode when a high level signal is
input to the MODE pin. When a low level signal is input, the voltage regulator block will enter into stand-by mode.
However, if the IC enters into stand-by mode via the CE pin, the voltage regulator block also shuts down. Likewise, if
the XC9509D to F series enters into stand-by mode via the CE pin, the DC/DC converter block can also shut down.
With the XC9509H to L series control can be PWM control when the MODE pin is 'H' level and PWM/PFM automatic
switching control when the MODE pin is 'L' level.
■NOTES ON USE
●Application Information
1.
The XC9509 series is designed for use with a ceramic output capacitor. If, however, the potential difference
between dropout voltage or output current is too large, a ceramic capacitor may fail to absorb the resulting high
switching energy and oscillation could occur on the output. If the input-output potential difference is large, connect
an electrolytic capacitor in parallel to compensate for insufficient capacitance.
2.
Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly
influenced by external component selection, such as the coil inductance, capacitance values, and board layout of
external components. Once the design has been completed, verification with actual components should be done.
3. When the difference between VIN and VOUT is large in PWM control, very narrow pulses will be outputted, and there
is the possibility that some cycles may be skipped completely.
4. When the difference between VIN and VOUT is small, and the load current is heavy, very wide pulses will be outputted
and there is the possibility that some cycles may be skipped completely: in this case, the Lx pin may not go low at all.
●DC/DC Waveform (3.3V, 1.2MHz)
<External Components>
L
:4.7μH(CDRH4D28C,SUMIDA)
CIN :4.7μF(ceramic)
CL
:10μF(ceramic)
<External
<External
Components>
Components>
L L :4.7μH(CDRH4D28C,SUMIDA)
:4.7μH(CDRH4D28C,SUMIDA)
CIN
CIN :4.7μF(ceramic)
:4.7μF(ceramic)
CLCL :10μF(ceramic)
:10μF(ceramic)
11/41
XC9509 Series
■NOTES ON USE (Continued)
●DC/DC Waveform (3.3V, 1.2MHz)(Continued)
5.
The IC's DC/DC converter operates in synchronous mode when the coil current is in a continuous state and
non-synchronous mode when the coil current is in a discontinuous state. In order to maintain the load current
value when synchronous switches to non-synchronous and vise versa, a ripple voltage may increase because of
the repetition of switching between synchronous and non-synchronous. When this state continues, the increase in
the ripple voltage stops. To reduce the ripple voltage, please increase the load capacitance value or use a schottky
diode externally. When the current used becomes close to the value of the load current when synchronous
switches to non- synchronous and vise versa, the switching current value can be changed by changing the coil
inductance value. In case changes to coil inductance are to values other than the recommended coil inductance
values, verification with actual components should be done.
Ics = (VIN - DCOUT) x OnDuty / (L x Fosc)
Ics: Switching current from synchronous rectification to non-synchronous rectification
.
OnDuty: OnDuty ratio of P-ch driver transistor ( =.step down ratio : DCOUT / VIN)
L: Coil inductance value
Fosc: Oscillation frequency
IDOUT: The DC/DC load current
6. When the XC9509H to L series operate in PWM/PFM automatic switching control mode, the reverse current may
become quite high around the load current value when synchronous switches to non-synchronous and vise versa
(also refer to no. 5 above). Under this condition, switching synchronous rectification and non-synchronous
rectification may be repeated because of the reverse current, and the ripple voltage may be increased to 100mV or
more. The reverse current is the current that flows in the PGND direction through the N-ch driver transistor from
the coil. The conditions, which cause this operation are as follows.
PFM Duty < Step down ratio = DCOUT / VIN x 100 (%)
PFM Duty: 30% (TYP.)
Please switch to PWM control via the MODE function in cases where the load current value of the DC/DC converter
is close to synchronous.
●DC/DC Waveform (1.8V, 600kHz) @ VIN=6.0V
<External Components>
L
10μH(CDRH5D28C,SUMIDA)
CIN :4.7μF(ceramic)
CL
:10μF(ceramic)
Step Down ratio: 1.8V / 6.0V = 30%<PFM Duty 31%>
12/41
XC9509
Series
■NOTES ON USE (Continued)
●DC/DC Waveform (3.3V, 1.2MHz) (Continued)
7. With the DC/DC converter of the IC, the peak current of the coil is controlled by the current limit circuit. Since the
peak current increases when dropout voltage or load current is high, current limit starts operating, and this can lead
to instability. When peak current becomes high, please adjust the coil inductance value and fully check the circuit
operation. In addition, please calculate the peak current according to the following formula:
Peak current: Ipk = (VIN - DCOUT) x OnDuty / (2 x L x Fosc) + IDOUT
8. When the peak current, which exceeds limit current flows within the specified time, the built-in driver transistor is
turned off (the integral latch circuit). During the time until it detects limit current and before the built-in transistor can
be turned off, the current for limit current flows; therefore, care must be taken when selecting the rating for the coil or
the Schottky diode.
9. When VIN is low, limit current may not be reached because of voltage falls caused by ON resistance or serial
resistance of the coil.
10.
In the integral latch circuit, latch time may become longer and latch operation may not work when VIN is 3.0V or
more.
11.
Use of the IC at voltages below the recommended voltage range may lead to instability.
12.
This IC and the external components should be used within the stated absolute maximum ratings in order to prevent
damage to the device.
13. When using IC with a regulator output at almost no load, a capacitor should be placed as close as possible between
AVDD and AGND (CIN2), connected with low impedance. Please also see the recommended pattern layout on page
14 for your reference. Should it not be possible to place the input capacitor nearby, the regulated output level may
increase up to the VDD level while the load of the DC/DC converter increases and the regulator output is at almost
no load.
14.
Should the bi-directional load current of the synchronous DC/DC converter and the regulator become large, please
be careful of the power dissipation when in use. Please calculate power dissipation by using the following formula.
Pd=PdDC/DC + PdVR
2
DC/DC power dissipation (when in synchronous operation) : PdDC/DC = IDOUT x RON
VR power dissipation: PdVR=(DCOUT – VROUT) x IROUT
RON: ON resistance of the built-in driver transistor to the DC/DC (= 0.5Ω <TYP.>)
RON=Rpon x P-chOnDuty / 100
+ Rnon x (1 – P-chOnDuty / 100)
15.
The voltage detector circuit built-in the XC9509 series internally monitor the VDD pin voltage, the DC/DC output pin
voltage and VR output pin voltage. For the XC9509B/C/E/F/K/L series, which voltage detector circuit monitors the
DC/DC output pin voltage and the VR output pin voltage, please determine the detect voltage value (VDF) by the
following equation.
VDF ≦ (Setting voltage on both the DCOUT voltage and the VROUT voltage)×85%*
* An assumed value of tolerance among the DCOUT voltage, the VROUT voltage, and the VD release voltage
(The VD detect voltage and hysteresis range).
13/41
XC9509 Series
■NOTES ON USE (Continued)
●Instructions on Pattern Layout
1.
In order to stabilize VIN's voltage level, we recommend that a by-pass capacitor (CIN) be connected as close as
possible to the AVDD & AGND pins. Should it not be possible to place the input capacitors nearby, the regulated
output level may increase because of the switching noise of the DC/DC converter.
2.
Please mount each external component as close to the IC as possible.
3. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit
impedance.
4.
Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground
currents at the time of switching may result in instability of the DC/DC converter and have adverse influence on the
regulator output.
5.
If using a Schottky diode, please connect the anode side to the AGND pin through CIN.
caused by the noise may occur depending on the arrangement of the Schottky diode.
6.
Please use the AVDD and PVDD pins with the same electric potential.
<MSOP-10 Reference pattern layout>
14/41
Characteristic degradation
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS
(A) DC/DC CONVERTER
(1) Efficiency vs. Output Current
15/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(2) Output Voltage VS. Output Current
16/41
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(3) Output Voltage vs. Ripple Voltage
17/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(4) Output Voltage vs. Ambient Temperature
DC/DC:2.5V,1.2MHz
DC/DC:0.9V,1.2MHz
VIN=2.4V,MODE=0V
CIN=4.7uF,CL=10.0uF,L=4.7uH(CDRH4D28C)
IDOUT=0.1mA
10mA
100mA
1.0
VIN=3.6V,MODE=0V
CIN=4.7uF,CL=10.0uF,L=4.7uH(CDRH4D28C)
2.7
Output Voltage : DCOUT (V)
Output Voltage : DCOUT (V)
1.1
0.9
0.8
0.7
IDOUT=0.1mA
10mA
100mA
2.6
2.5
2.4
2.3
-50
-25
0
25
50
75
100
-50
-25
Ambient Temperature : Ta ( ℃)
0
25
50
75
100
Ambient Temperature : Ta ( ℃)
DC/DC:4.0V,1.2MHz
VIN=5.0V,MODE=0V
CIN=4.7uF,CL=10.0uF,L=4.7uH(CDRH4D28C)
Output Voltage : DCOUT (V)
4.2
IDOUT=0.1mA
10mA
100mA
4.1
4.0
3.9
3.8
-50
-25
0
25
50
75
100
Ambient Temperature : Ta ( ℃)
(5) Soft Start Time vs. Ambient Temperature
DC/DC:1.2MHz
DC/DC:600kHz
VIN=6.0V,CE=0V to 6.0V,MODE=0V,IDOUT=0.1mA
CIN=4.7uF,CL=10.0uF,L=4.7uH(CDRH4D28C)
15
VIN=6.0V,CE=0V to 6.0V,MODE=0V,IDOUT=0.1mA
CIN=4.7uF,CL=10.0uF,L=10.0uH(CDRH5D28)
15
12
Soft Start Time : Tss (ms)
Soft Start Time : Tss (ms)
DCOUT=0.9V
DCOUT=2.5V
9
6
3
12
DCOUT=2.5V
DCOUT=4.0V
9
6
DCOUT=0.9V
3
DCOUT=4.0V
0
0
-50
-25
0
25
50
75
Ambient Temperature : Ta ( ℃)
18/41
100
-50
-25
0
25
50
75
Ambient Temperature : Ta (℃)
100
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(6) DC/DC Supply Current vs. Ambient Temperature (VR: Shutdown)*
DC/DC:1.2MHz
CE=VIN,DCOUT=VIN,MODE=0V(VR:SHUTDOWN)
DCOUT=0.9V
2.5V
4.0V
400
300
200
100
0
-50
-25
0
25
50
75
500
DC/DC Supply Current : IDD-DC(uA)
DC/DC Supply Current : IDD-DC(uA)
500
DC/DC:600kHz
100
CE=VIN,DCOUT=VIN,MODE=0V(VR:SHUTDOWN)
DCOUT=0.9V
2.5V
4.0V
400
300
200
100
0
-50
-25
0
25
50
75
100
Ambient Temperature : Ta ( ℃)
Ambient Temperature : Ta ( ℃)
DC/DC:300kHz
DC/DC Supply Current : IDD-DC(uA)
500
CE=VIN,DCOUT=VIN,MODE=0V(VR:SHUTDOWN)
DCOUT=0.9V
2.5V
4.0V
400
300
200
100
0
-50
-25
0
25
50
75
100
Ambient Temperature : Ta ( ℃)
*XC9509A/B/C series only
19/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(7) LX Pch/Nch ON Resistance vs. Input Voltage
DC/DC:LX Pch
CE=VIN,LX=VIN-0.05V, DCOUT=0V
0.8
Ta= 85℃
LX=0.05V, DCOUT=VIN
1.0
LX Nch On Resistance (Ω)
1.0
LX Pch On Resistance (Ω)
DC/DC:LX Nch
Ta= 25℃
0.6
0.4
0.2
0.8
Ta= 85℃
0.6
0.4
0.2
Ta= -40℃
Ta= -40℃
0.0
Ta= 25℃
0.0
2.0
3.0
4.0
5.0
2.0
6.0
3.0
Input Voltage : VIN (V)
4.0
5.0
6.0
Input Voltage : VIN (V)
(8) Oscillation Frequency vs. Ambient Temperature
(9) U.V.L.O. Voltage vs. Ambient Temperature
DC/DC:2.5V,1.2MHz
CIN=4.7uF,CL=10.0uF,MODE=0V,IDOUT=10mA
UVLO Voltage : UVLO1,UVLO2 (V)
Oscillation Frequency:FOSC (MHz)
1.6
VIN=3.6V
4.2V
5.0V
6.0V
1.4
1.2
1.0
1.8
UVLO2(release)
1.4
UVLO1(detect)
1.0
0.6
0.8
-50
-25
0
25
50
75
Ambient Temperature : Ta ( ℃)
20/41
MODE=0V
CIN=4.7uF,CL=10.0uF,L=4.7uH(CDRH4D28C)
2.2
100
-50
-25
0
25
50
75
Ambient Temperature : Ta (℃)
100
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(10-1) DC/DC Load Transient Response (DCOUT: 1.8V, FOSC: 1.2MHz)
(a) PWM Control
(b) PWM/PFM Automatic Switching Control* (*XC9509H/K/L Series Only)
21/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(10-2) DC/DC Load Transient Response (*DCOUT: 3.3V, FOSC: 1.2MHz)
(a) PWM Control
(b) PMM/PFM Automatic Switching Control* (*XC9509H/K/L Series Only)
22/41
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(10-3) DC/DC Load Transient Response (*DCOUT: 1.8V, FOSC: 600kHz)
(a) PWM Control
(b) PMM/PFM Automatic Switching Control* (*XC9509H/K/L Series Only)
23/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(10-4) DC/DC Load Transient Response (DCOUT: 3.3V, FOSC: 600kHz)
(a) PWM Control
(b) PMM/PFM Automatic Switching Control* (*XC9509H/K/L Series Only)
24/41
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(10-5) DC/DC Load Transient Response (DCOUT: 1.8V, FOSC: 600kHz)
(a) PWM Control
(b) PMM/PFM Automatic Switching Control* (*XC9509H/K/L Series Only)
25/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(A) DC/DC CONVERTER (Continued)
(10-6) DC/DC Load Transient Response (DCOUT: 3.3V, FOSC: 600kHz)
(a) PWM Control
(b) PMM/PFM Automatic Switching Control* (*XC9509H/K/L Series Only)
26/41
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR
(1) Output Voltage vs. Input Voltage
VR:0.9V
VR:0.9V
1.00
Output Voltage : VROUT (V)
Output Voltage : VROUT (V)
Ta=25℃,CIN=4.7uF,CL=4.7uF
Ta=25℃,CIN=4.7uF,CL=4.7uF
1.3
1.1
0.9
0.7
IROUT=0mA
1mA
30mA
100mA
0.5
0.3
1.2
0.95
0.90
0.85
IROUT=0mA
1mA
30mA
100mA
0.80
0.75
1.4
1.6
1.8
2.0
2.2
2.0
3.0
Input Voltage : VIN (V)
4.0
Ta=25℃,CIN=4.7uF,CL=4.7uF
Output Voltage : VROUT (V)
Output Voltage : VROUT (V)
2.7
2.5
2.3
IROUT=0mA
1mA
30mA
100mA
2.2
2.4
2.6
2.8
Ta=25℃,CIN=4.7uF,CL=4.7uF
2.60
2.9
1.9
2.0
2.55
2.50
2.45
IROUT=0mA
1mA
30mA
100mA
2.40
2.35
3.0
3.0
4.0
5.0
Input Voltage : VIN (V)
Input Voltage : VIN (V)
VR:4.0V
VR:4.0V
Ta=25℃,CIN=4.7uF,CL=4.7uF
Output Voltage:VROUT(V)
Output Voltage : VROUT (V)
4.2
4.0
3.8
IROUT=0mA
1mA
30mA
100mA
3.4
3.5
6.0
Ta=25℃,CIN=4.7uF,CL=4.7uF
4.10
4.4
3.6
6.0
VR:2.5V
VR:2.5V
2.1
5.0
Input Voltage : VIN (V)
4.05
4.00
3.95
IROUT=0mA
1mA
30mA
100mA
3.90
3.85
3.7
3.9
4.1
Input Voltage : VIN (V)
4.3
4.5
5.0
5.2
5.4
5.6
5.8
6.0
Input Voltage : VIN (V)
27/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR (Continued)
(2) Output Voltage vs. Output Current (Current Limit)
28/41
Output Current : IROUT (mA)
Output Current : IROUT (mA)
Output Current : IROUT (mA)
Output Current : IROUT (mA)
Output Current : IROUT (mA)
Output Current : IROUT (mA)
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR (Continued)
(3) Dropout Voltage vs. Output Current
VR:2.5V
VR:0.9V
CIN=4.7uF,CL=4.7uF
0.5
0.8
0.4
Dropout Voltage : Vdif (V)
Dropout Voltage : Vdif (V)
CIN=4.7uF,CL=4.7uF
1.0
0.6
Ta= 85℃
25℃
0.4
Ta= -40℃
0.2
0.3
Ta= 25℃
0.2
Ta= -40℃
Ta= 85℃
0.1
0.0
0.0
0
50
100
150
200
0
50
100
150
200
Output Current : IROUT (mA)
Output Current : IROUT (mA)
VR:4.0V
CIN=4.7uF,CL=4.7uF
Dropout Voltage : Vdif (V)
0.5
0.4
0.3
0.2
Ta= 25℃
Ta= -40℃
Ta= 85℃
0.1
0.0
0
50
100
150
200
Output Current : IROUT (mA)
29/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR (Continued)
(4) Output Voltage vs. Output Current
VR:0.9V
VR:2.5V
VIN=2.4V,CIN=4.7uF,CL=4.7uF
Output Voltage : VROUT (V)
Output Voltage : VROUT (V)
Ta= -40℃
25℃
1.0
0.9
0.8
Ta= 85℃
0.7
0.6
50
100
150
200
Output Current : IROUT (mA)
Ta= -40℃
2.5
2.4
Ta= 85℃
2.3
VIN=5.0V,CIN=4.7uF,CL=4.7uF
4.2
Ta= 25℃
Ta= -40℃
4.1
4.0
3.9
Ta= 85℃
3.8
3.7
0
50
100
150
Output Current : IROUT (mA)
0
50
100
150
Output Current : IROUT (mA)
VR:4.0V
Output Voltage : VROUT (V)
Ta= 25℃
2.6
2.2
0
30/41
VIN=3.5V,CIN=4.7uF,CL=4.7uF
2.7
1.1
200
200
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR (Continued)
(5) VR Supply Current vs. Ambient Temperature (DC/DC Shutdown)*
Ambient Temperature : Ta (℃)
Ambient Temperature : Ta (℃)
Ambient Temperature : Ta (℃)
31/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR (Continued)
(6) Output Voltage vs. Ambient Temperature
32/41
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR (Continued)
(7) Ripple Rejection Ratio vs. Ripple Frequency
33/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(B) VOLTAGE REGULATOR (Continued)
(8) VR Load Transient Response
34/41
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(C) VOLTAGE DETECTOR
(1) Output Current vs. Input Voltage
(2) Detect Voltage vs. Input Voltage
35/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(C) VOLTAGE DETECTOR (Continued)
(3)DETECT VOLTAGE , RELEASE VOLTAGE vs. AMBIENT TEMPERATURE
(3) Detect Voltage, Release Voltage vs. Ambient Temperature
VD:0.9V
VD:2.5V
3.1
Detect Voltage , Release Voltage
: VDF,VDR (V)
Detect Voltage , Release Voltage
: VDF,VDR (V)
1.5
1.3
1.1
VDR
0.9
VDF
0.7
0.5
-50
-25
0
25
50
75
100
Ambient
Temp. : Ta (deg.)
Ambient
Temperature
: Ta (℃)
Detect Voltage , Release Voltage
: VDF,VDR (V)
5.6
5.4
VDR
5.2
5.0
VDF
4.8
4.6
-25
0
25
50
75
Ambient
Temp. : Ta (deg.)
Ambient
Temperature
: Ta (℃)
36/41
VDR
2.7
2.5
VDF
2.3
2.1
-50
-25
0
25
50
75
Ambient
Temp. : Ta (deg.)
Ambient
Temperature
: Ta (℃)
VD:5.0V
-50
2.9
100
100
XC9509
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(D) COMMON
(1) Supply Current vs. Ambient Temperature (DC/DC & VR & VD)
Ambient Temperature : Ta (℃)
(2) Shutdown Current vs. Input Voltage
(3) Shutdown Current vs. Ambient Temperature
37/41
XC9509 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(D) COMMON (Continued)
(4) CE Pin Threshold Voltage vs. Ambient Temperature
(5) MODE Pin Threshold Voltage vs. Ambient Temperature
38/41
XC9509
Series
■PACKAGING INFORMATION
●MSOP-10
●USP-10
* Soldering fillet surface is not
formed because the sides of
the pins are not plated
●USP-10 Recommended Pattern Layout
●USP-10 Recommended Metal Mask Design
2.3
39/41
XC9509 Series
■MARKING RULE
①Represents product series
●MSOP-10, USP-10
MARK
8
PRODUCT SERIES
XC9509xxxxxx
②Represents DC/DC control methods and MODE pin
MARK
USP-10
(TOP VIEW)
A
B
C
D
E
F
H
K
L
MODE PIN
(H level)
MODE PIN
(L level)
VR: OFF
VR:ON
DC/DC: OFF
DC/DC: ON
DC/DC CONTROL
PWM Control
PWM, PFM/PWM
Manual Switch
PFM/PWM
PWM Control
Auto Switching
PRODUCT SERIES
XC9509Axxxxx
XC9509Bxxxxx
XC9509Cxxxxx
XC9509Dxxxxx
XC9509Exxxxx
XC9509Fxxxxx
XC9509Hxxxxx
XC9509Kxxxxx
XC9509Lxxxxx
③④Represents detect voltage DC/DC,VR and VD (ex.)
MARK
③
0
MSOP-10
(TOP VIEW)
④
3
DC/DC
VR
VD
PRODUCT SERIES
1.8V
3.3V
3.0V
XC9509x03xxx
⑤Represents oscillation frequency
MARK
3
6
C
OSCILLATION FREQUENCY
300kHz
600kHz
1.2MHz
PRODUCT SERIES
XC9509xxx3xx
XC9509xxx6xx
XC9509xxxCxx
⑥Represents production lot number
0 to 9,A to Z reverse character 0 to 9, A to Z repeated (G, I, J, O, Q, W excepted)
Note: No character inversion used.
40/41
XC9509
Series
1. The products and product specifications contained herein are subject to change without
notice to improve performance characteristics.
Consult us, or our representatives
before use, to confirm that the information in this catalog is up to date.
2. We assume no responsibility for any infringement of patents, patent rights, or other
rights arising from the use of any information and circuitry in this catalog.
3. Please ensure suitable shipping controls (including fail-safe designs and aging
protection) are in force for equipment employing products listed in this catalog.
4. The products in this catalog are not developed, designed, or approved for use with such
equipment whose failure of malfunction can be reasonably expected to directly
endanger the life of, or cause significant injury to, the user.
(e.g. Atomic energy; aerospace; transport; combustion and associated safety
equipment thereof.)
5. Please use the products listed in this catalog within the specified ranges.
Should you wish to use the products under conditions exceeding the specifications,
please consult us or our representatives.
6. We assume no responsibility for damage or loss due to abnormal use.
7. All rights reserved. No part of this catalog may be copied or reproduced without the
prior permission of Torex Semiconductor Ltd.
41/41