XC9509 Series
September 30, 2003 Ver. 1
Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel plus Voltage Detector
!
Input Voltage Range
!
Output Voltage Range
2.4V ~ 6.0V
DC/DC
VR
VD
0.9 ~ 4.0V (±2%)
0.9 ~ 4.0V (±2%)
0.9 ~ 5.0V (±2%)
600mA
200mA
!
Switching Frequency
!
Output Current
!
Ultra Small Packages
!
Ceramic Capacitor Compatible
300kHz, 600kHz, 1.2MHz
DC/DC
VR
"
APPLICATIONS
#
HDD
#
CD-R / RW, DVD
#
PDAs, portable communication modem
#
Cellular phones
#
Palmtop computers
#
Cameras, video recorders
MSOP-10, USP-10
"
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, 300 kHz,
600 kHz, and 1.2 MHz.
Output voltage settings for the DC/DC and VR are set-up internally in
0.1V 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.
"
FEATURES
Input Voltage Range :
Load Capacitors :
2.4V ~ 6.0V
Ceramic Capacitors Compatible
(Low ESR Capacitors)
VD Function :
Sense internally either
VDD, DCOUT, or VROUT.
Nch Open Drain Output
<DC/DC Converter>
Output Voltage Range :
Output Current :
Controls :
0.9 ~ 4.0V (±2%)
600mA
PWM Control
PWM, PWM / PFM Automatic
Switching External
300kHz, 600kHz, 1.2MHz
Oscillation Frequency :
<Regulator>
Output Voltage Range :
Current Limit
Dropout Voltage :
High Ripple Rejection
0.9 ~ 4.0V (±2%)
300mA
80mV @ IOUT=100mA (VOUT=2.8V)
60dB @1kHz (VOUT=2.8V)
"
TYPICAL APPLICATION CIRCUIT
"
TYPICAL PERFORMANCE CHARACTERISTICS
XC9509Hxxxx
SD
VIN=3.6V, Topr=25
O
C, L:4.7uH(CDRH4D28C)
CIN:4.7uF(ceramic), CL1:10uF(ceramic), CL2: 1uF(ceramic)
L
CL1
DCOUT
)
100
90
80
VROUT
(
1
2
3
4
CIN1
CIN2
5
CE
PGND
LX
DCOUT
VROUT
MODE
AGND
10
9
8
7
CL2
6
DC/DC Efficiency
(DCOUT:2.2V, 1.2MHz)
PVDD
AVDD
VDOUT
Efficiency EFFI (%)
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
PWM/PFM Switching Control
PWM Control
MSOP-10
(TOP VIEW)
DC/DC Output Current IDOUT (mA)
Semiconductor Ltd.
Data Sheet
1
XC9509 Series
Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel plus Voltage Detector
"
PIN CONFIGURATION
"
PIN ASSIGNMENT
PIN
NUMBER
1
2
3
PGND 1
CE 2
PVDD 3
AVDD 4
VDOUT 5
10 LX
9 DCOUT
8 VROUT
7 MODE
6 AGND
PIN NAME
PGND
CE
PVDD
AVDD
VDOUT
AGND
MODE
VROUT
DCOUT
LX
FUNCTION
Power Ground
Chip Enable
Power Supply 1
Power Supply 2
VD Input
Analog Ground
Mode Switch
VR Output
DC/DC Output
Switch
MSOP-10(TOP VIEW)
PGND 1
CE 2
PVDD 3
AVDD4
VDOUT 5
10 LX
9 DCOUT
8 VROUT
7 MODE
6 AGND
4
5
6
7
8
9
USP-10 (TOP VIEW)
10
"
SELECTION GUIDE
#
Ordering Information
XC9509
123456
SYMBOL
The input for the voltage regulator block comes from VDD.
DESCRIPTION
DESIGNATOR
1
23
4
3
6
C
A
D
R
L
Control Methods, the MODE pin, the VD Sense pin (See the chart below)
Setting voltage and specifications of each DC/DC, VR, and VD (Based on the internal standard)
Oscillation Frequency of DC/DC :
300kHz
600kHz
1.2MHz
Package Type :
MSOP-10
USP-10
Device Orientation :
Embossed Tape : Standard Feed
Embossed Tape : Reverse Feed
5
6
%
Control Methods, MODE Pins, and VD SENSE Pins
SERIES
1
A
B
C
D
E
F
H
K
L
DC/DC CONTROL METHODS
MODE PINS (H LEVEL)
VR : OFF
MODE PINS (L LEVEL)
VR : ON
VD SENSE
VDD
DCOUT
VROUT
VDD
PWM Control
DC/DC : OFF
DC/DC : ON
XC9509
DCOUT
VROUT
VDD
PWM, PFM/PWM Manual Switch
PFM/PWM Auto Switch
PWM Control
DCOUT
VROUT
* 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 stand-by mode.
(The MODE pin does not operate independently.)
Semiconductor Ltd.
Data Sheet
2
XC9509 Series
Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel plus Voltage Detector
"
PACKAGING INFORMATION
%
MSOP-10
0.15+0.01
-
0.53+0.10
-
%
USP-10
2.6+0.06
2.7+0.05
3.00+0.10
-
4.90+0.10
-
MAX 0.6
0.30
0.15
0.86+0.05
-
(1.50)
0~ 5
(0.1)
2.30
(0.5)
0.2+0.05
3.00+0.10
-
O
0.25+0.0
6
(0.2)
(0.5
)
"
BLOCK DIAGRAM
DCOUT
Phase
Compensation
0.075+0.025
-
* Soldering fillet surface is not formed
because the sides of the pins are not
plated.
PVDD
-
+
+
-
Logic
Buffer,
Driver
Vref with
soft start
PWM/PFM
Controller
Current Limit &
Feedback
R amp Wave
Generator,
OSC
LX
CE
ON/OFF,
CONTROL
eac h
circuit
PGND
eac h
circuit
MODE
CONTROL
MODE
AVDD
VROUT
-
U.V.L.O
+
Current
Li mi t
+
VDOUT
+
-
Vref
SENSE
(VDD or DCOUT or VROUT)
-
Vref
AGND
* Diodes shown in the above circuits are protective diodes.
"
ABSOLUTE MAXIMUM RATINGS
PARAMETER
AVDD Pin Voltage
PVDD Pin Voltage
DCOUT Pin Voltage
VROUT Pin Voltage
VDOUT Pin Voltage
LX Pin Voltage
CE Pin Voltage
MODE Pin Voltage
Continuous Power Dissipation (*1)
Operating Temperature Range
Storage Temperature Range
(*1) IOUT = Pd / (VIN - VOUT) when PC board mounting.
(*2) Package power dissipation
Semiconductor Ltd.
SYMBOL
AVDD
PVDD
DCOUT
VROUT
VDOUT
LX
CE
MODE
MSOP-10
USP-10
Topr
Tstg
Pd
RATINGS
- 0.3 ~ 6.5
- 0.3 ~ VDD + 0.3
- 0.3 ~ VDD + 0.3
- 0.3 ~ VDD + 0.3
- 0.3 ~ VDD + 0.3
- 0.3 ~ VDD + 0.3
- 0.3 ~ VDD + 0.3
- 0.3 ~ VDD + 0.3
350
120 (*2)
- 40 ~ + 85
- 55 ~ + 125
Ta=25
O
C
UNITS
V
V
V
V
V
V
V
V
mW
O
O
C
C
Data Sheet
3
XC9509 Series
Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel plus Voltage Detector
"
ELECTRICAL CHARACTERISTICS
XC9509HxxCAx
%
Common Characteristics
PARAMETER
Supply Current 1
Supply Current 2
Stand-by Current (note 1)
Input Voltage Range
U.V.L.O. Voltage (note 2)
CE 'H' Level Voltage
CE 'L' Level Voltage
CE 'H' Level Current
CE 'L' Level Current
MODE 'H' Level Voltage
MODE 'L' Level Voltage
MODE 'H' Level Current
MODE 'L' Level Current
%
DC/DC Converter (2.2V product)
PARAMETER
Output Voltage
Oscillation Frequency
Maximum Duty Ratio
Manimum Duty Ratio
PFM Duty Ratio
LX SW 'High' On Resistance
(note 3)
LX SW 'Low' On Resistance
Maximum Output Current
Current Limit
Efficiency (note 4)
Output Voltage
Temperature Characteristics
Soft Start Time
Latch Time (note 5)
SYMBOL
DCOUT
FOSC
MAXDUTY
MINDUTY
PFMDUTY
RLXH
RLXL
IMAX1
ILIM1
EFFI
!
VOUT
Connected to the external components,
IDOUT=100mA
CONDITIONS
Connected to the external components,
IDOUT=30mA
Connected to the external components,
IDOUT=10mA
DCOUT=0V
DCOUT=VIN
Connected to the external components,
No Load
DCOUT=0V, LX=VIN-0.05V
MIN.
2.156
1.02
100
-
21
-
-
600
-
-
TYP.
2.200
1.20
-
-
30
0.5
0.5
-
1.2
90
MAX.
2.244
1.38
-
0
38
-
-
-
-
-
UNITS
V
MHz
%
%
%
Ω
Ω
mA
A
%
ppm
/
O
C
mS
mS
Ta=25
O
C
SYMBOL
IDD1
IDD2
ISTB
VIN
VUVLO
VCEH
VCEL
ICEH
ICEL
VMH
VML
IMH
IML
CONDITIONS
VIN=CE=DCOUT=5.0V
VIN=CE=5.0V, DCOUT=0V
VIN=6.5V, CE=0V
MIN.
-
-
-
2.4
1.00
0.6
VSS
- 0.1
- 0.1
0.6
VSS
- 0.1
- 0.1
TYP.
300
240
0.6
-
1.40
-
-
-
-
-
-
-
-
MAX.
-
-
2.5
6.0
1.78
VDD
0.25
0.1
0.1
VDD
0.25
0.1
0.1
UNITS
µΑ
µΑ
µΑ
V
V
V
V
µΑ
µΑ
V
V
µΑ
µΑ
TEST CIRCUIT
1
1
1
-
3
3
3
1
1
3
3
1
1
Ta=25
O
C
TEST CIRCUIT
3
3
4
4
3
5
3
6
3
3
3
3
Ta=25
O
C
IDOUT=30mA
-40
O
C<Topr<85
O
C
!
Topr
#
VOUT
Connected to the external components,
TSS
CE=0V"VIN, IDOUT=1mA
Connected to the external components,
VIN=CE=5.0V,
Tlat
Short DCOUT by 1Ω resistor
-
-
-
±100
5
8
-
-
-
%
Regulator (1.8V product)
PARAMETER
Output Voltage
Maximum Output Current
Load Regulation
Dropout Voltage 1 (note 6)
Dropout Voltage 2
Line Regulation
Current Limit
Short-Circuit Current
Ripple Rejection Rate
Output Voltage
Temperature Characteristics
SYMBOL
VROUT(E)
IMAX2
!
VROUT
Vdif 1
Vdif 2
!
VOUT
!
VIN
#
VOUT
ILIM2
ISHORT
PSRR
!
VOUT
!
Topr
#
VOUT
1mA<IROUT<100mA
IROUT=30mA
IROUT=100mA
IROUT=30mA
VROUT(T)+1V<VIN<6V
VROUT=VROUT(E)x0.9
VROUT=VSS
VIN={VOUT(T) + 1.0} VDC + 0.5Vp-pAC
IROUT=30mA, f=1kHz
IDOUT=30mA
-40
O
C<Topr<85
O
C
-
-
-
-
300
30
60
±100
-
-
-
-
mA
mA
dB
ppm
/
O
C
CONDITIONS
IROUT=30mA
MIN.
1.764
200
-
-
-
-
TYP.
1.800
-
15
30
85
0.2
MAX.
1.836
-
50
-
-
-
UNITS
V
mA
mV
mV
mV
%/V
TEST CIRCUIT
2
2
2
2
2
2
7
7
2
2
Semiconductor Ltd.
Data Sheet
4
XC9509 Series
Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel plus Voltage Detector
"
ELECTRICAL CHARACTERISTICS (Continued)
%
Detector (2.7V product)
PARAMETER
Detect Voltage
Hysteresis Range
VD Output Current
Output Voltage
Temperature Characteristics
Test Conditions :
SYMBOL
VDF
VHYS
IVD
!
VDF
!
Topr
#
VDF
VDOUT=0.5V
-40
O
C<Topr<85
O
C
* VROUT(T) : Setting Output Voltage
CONDITIONS
MIN.
2.646
3
1
TYP.
2.700
5
-
MAX.
2.754
8
-
UNITS
V
%
mA
ppm
/
O
C
Ta=25
O
C
TEST CIRCUIT
8
-
9
8
-
±100
-
Unless otherwise stated;
VD : VIN=6.0V
DC/DC : VIN=3.6V [@ DCOUT:2.2V]
VR : VIN = VROUT(T) + 1.0 (V) [When VROUT(T) <1.4V, VIN =2.4V]
note 1 : VD operates when in stand-by mode.
note 2 : Including hysteresis operating voltage range.
note 3 : On resistance = 0.05V / ILX
note 4 : EFFI = { ( Output Voltage x Output Current ) / ( Input Voltage x Input Current) } x 100
note 5 : Time until it short-circuits DCOUT with GND through 1Ω of resistance from a state of operation
and is set to DCOUT=0V from current limit pulse generating.
note 6 : Vdif = (VIN1
(note 7)
- VROUT1
(note 8 )
)
note 7 : VIN 1 = The input voltage when VROUT1 appears as input voltage is gradually decreased.
note 8 : VROUT1 = A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {VROUT(T) + 1.0V} is input.
Semiconductor Ltd.
Data Sheet
5
