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PDF XC9213B103VRL Data sheet ( Hoja de datos )
| Número de pieza | XC9213B103VRL | |
| Descripción | Driver Transistor Built-In Synchronous Step-Down DC/DC Controller Ics | |
| Fabricantes | Torex Semiconductor | |
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XC9213 Series
Preliminary
! Synchronous, Bootstrap
Nch-Nch Drive
! Input Voltage Range
: 2.5V ~ 25.0V
! Switching Frequency
: 300kHz (±15%)
! PWM/PFM Manual Switching Control
! Overcurrent Protection Circuit Built-In
! High Efficiency
: 93% (TYP.)
! TSSOP-16 Package
! Ceramic Capacitor Compatible
Driver Transistor Built-In
Synchronous Step-Down DC/DC Controller Ics
Input Voltage : 25V
May 20, 2003 Ver. 1
" APPLICATIONS
# PDAs
# Mobile Phones
# Note book computers
# Portable Audio Systems
# Various Multi-function Power Supplies
" GENERAL DESCRIPTION
XC9213 series is Nch-Nch drive, synchronous, step-down DC/DC
controller ICs with a built-in bootstrap driver circuit. Output will be
stable no matter which load capacitors, including a low ESR
capacitor, are used.
Resistance (RSENSE) of about 100mΩ will be required as a current
sense. The phase compensation is also run when a low ESR
capacitor is used. In addition, the circuit is double protected by the
ways of limiting the current while detecting overshoot current and
making output shutdown at any given timing by a protection time
setting capacitor (CPRO).
The output voltage can be set freely within a range of 1.5V~15.0V
with 1.0V (accuracy ±1.5%) of internal reference voltage by using
externally connected resistors (RFB1, 2). Synchronous rectification
PWM control can be switched to non-synchronous 30mV current
limit PFM/PWM automatic switchable control (= voltage between
RSENSE pins) by using the MODE pin.
The series has a built-in voltage detector for monitoring a selected
voltage by external resistors.
During stand-by (CE pin = low) all circuits are shutdown to reduce
current consumption to as low as 3.0µA or less.
" FEATURES
Input Voltage Range
Output Voltage Range
Oscillation Frequency
Output Current
Control
Current Limiter, Protection
High Efficiency
Detect Voltage Function
Stand-by Current
Load Capacitor
Package
: 2.5V ~ 25.0V
: 1.5V ~ 15.0V externally set
Reference voltage : 1.0V (±1.5%)
: 300kHz (±15%)
: More than 5A (VIN=5.0V, VOUT=3.3V)
: PWM/PFM manual-switching control.
: Current limit operates at voltage
sense 150mV.
Shutdown time can be adjusted
by CPRO.
: 93% (TYP., PWM mode @ VIN=5.0V,
VOUT = 3.3V, 1A)
: Detects 0.9V / Open-drain output
: ISTB = 3.0µA (MAX.)
: Low ESR (ceramic, etc.)
capacitor compatible
: TSSOP-16
" TYPICAL APPLICATION CIRCUIT
SD2
VIN CIN
V Di n
V Do u t
RS E NS E
VIN VS E NS E BST
EXT1
V Di n
V Do u t
Lx
XC9213
VL
CVL
CS S
CSS
FB
CPRO
EXT2
CPRO AGND M ODE CE PGND
CB S T
N1
L
CFB
()
SD1
N2
" TYPICAL PERFORMANCE CHARACTERISTICS
XC9213B103V (FOSC:300kHz,3.0V)
VIN : 5.0V, Tr1,Tr2: IRF7313,
L : 6.1uH (CDRH127-6H1), Cout : 150uF (OS)
100
VOUT
RFB1
CL
RFB2
80
60
40
20
0
0.01
PWM
Synchronous Rectification
PWM / PFM
Non Synchronous Rectification
0.1 1
Output Current IOUT (A)
10
1
1 page  
XC9213 Series
Preliminary
Driver Transistor Built-In
Synchronous Step-Down DC/DC Controller Ics
Input Voltage : 25V
" EXTERNAL COMPONENTS
<Setting of Output Voltage>
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 MΩ or less.
VOUT = RFB1 / RFB2 + 1
The value of CFB1, speed-up capacitor for phase compensation, should be fzfb= 1 / (2 × π × CFB × RFB1) which is equal to 10kHz.
Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of load capacity
(CL).
[ Example of Equation ]
VOUT = 3.0V
RFB1 = 200kΩ, RFB2 = 110kΩ, CFB = 68pF
VOUT = 220k / 110k + 1 =3.0V
fzfb = 1 / (2 x π x 68p x 220k ) = 10.64kHz
<External Components>
Tr 1, Tr 2
$ IOUT = 2 ~ 3A
IRF7313 (Nch x 2) (IR, SO-8)
$ IOUT = ~10A
SUP70N03-09 (Vishay, TO-220AB)
SUB70N03-09 (Vishay, TO-263)
L:
SD 1 :
SD 2 :
6.8µF
CMS02
CRS02
(CDH127-6H1, SUMIDA)
(Schottky barrier diode, TOSHIBA)
(Schottky barrier diode, TOSHIBA)
* Please select SD2 with low reverse current.
RSENSE : Current Limit Value = 150mV / RSENSE
CPRO : TPRO = CPRO x 1e6
CSS=
TSS = CSS x 3e6
CBST : 0.1µF ~ 1µF
CVL :
CIN :
CL :
1µF
22µF
150µF
ex.) When RSENSE = 30mΩ,
Current Limit = 150mV / 30mΩ = about 5A
ex.) When CPRO = 100pF
TPRO = 100e -12 x 1e6 =100µS
ex.) When CSS = 3300pF,
TPRO = 3300e - 12 x 3e6 = 9.9mS
* Please adjust according to
reverse current characteristics of SD2.
(OS-CON, SANYO)
(OS-CON, SANYO)
5
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