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TPS62403 Datasheet(PDF) 4 Page - Texas Instruments

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Part No. TPS62403
Description  2.25MHz 400mA/600mA Dual Step-Down Converter In Small 3x3mm QFN Package
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TPS62403 Datasheet(HTML) 4 Page - Texas Instruments

 
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TPS62400
,, TPS62401
TPS62403
SLVS681C – JUNE 2006 – REVISED DECEMBER 2006
ELECTRICAL CHARACTERISTICS (continued)
V
IN = 3.6V, VOUT = 1.8V, EN = VIN, MODE = GND, L = 2.2µH, COUT = 20µF, TA = –40°C to 85°C typical values are at TA =
25
°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ttimeout
Timeout for entering power save mode
MODE/DATA Pin changes from high to low
520
µs
POWER SWITCH
RDS(ON)
P-Channel MOSFET on-resistance,
VIN = VGS = 3.6V
280
620
m
Converter 1,2
ILK_PMOS
P-Channel leakage current
VDS = 6.0V
1
µA
RDS(ON)
N-Channel MOSFET on-resistance
VIN = VGS = 3.6V
200
450
m
Converter 1,2
ILK_SW1/SW2
Leakage current into SW1/SW2 pin
Includes N-Chanel leakage current,
6
7.5
µA
VIN = open, VSW = 6.0V, EN = GND(4)
ILIMF
Forward Current Limit OUTPUT 1
0.68
0.8
0.92
2.5V
≤ V
IN≤ 6.0V
A
PMOS and NMOS
OUTPUT 2
0.85
1.0
1.15
TSD
Thermal shutdown
Increasing junction temperature
150
°C
Thermal shutdown hysteresis
Decreasing junction temperature
20
°C
OSCILLATOR
fSW
Oscillator frequency
2.5V
≤ VIN ≤ 6.0V
2.0
2.25
2.5
MHz
OUTPUT
VOUT
Adjustable output voltage range
0.6
VIN
V
Vref
Reference voltage
600
mV
Voltage positioning active,
MODE/DATA = GND,
1.01
VOUT (PFM)
–1.5%
2.5%
device operating in PFM mode,
VOUT
VIN = 2.5V to 5.0V (6)(7)
MODE/DATA = GND;
DC output voltage accuracy adjustable
device operating in PWM Mode,
–1%
0%
1%
and fixed output voltage(5)
VIN = 2.5V to 6.0V(7)
VIN = 2.5V to 6.0V, Mode/Data = VIN ,
VOUT(PWM)
Fixed PWM operation,
–1%
0%
1%
0mA < IOUT1 < 400mA ; 0mA < IOUT2 <
600mA(8)
DC output voltage load regulation
PWM operation mode
0.5
%/A
tStart up
Start-up time
Activation time to start switching(9)
170
µs
tRamp
VOUT Ramp UP time
Time to ramp from 5% to 95% of VOUT
750
µs
(4)
On pins SW1 and SW2 an internal resistor of 1M
Ω is connected to GND.
(5)
Output voltage specification does not include tolerance of external voltage programming resistors
(6)
Configuration L typ 2.2
µH, C
OUT typ 20µF, see parameter measurement information, the output voltage ripple in PFM mode depends on
the effective capacitance of the output capacitor, larger output capacitors lead to tighter output voltage tolerance.
(7)
In Power Save Mode, PWM operation is typically entered at IPSM = VIN/32Ω.
(8)
For VOUT > 2.0V, VIN min = VOUT +0.5V
(9)
This time is valid if one converter turns from shutdown mode (EN2 = 0) to active mode (EN2 =1) AND the other converter is already
enabled (e.g., EN1 = 1). In case both converters are turned from shutdown mode (EN1 and EN2 = low) to active mode (EN1 and/or
EN2=1) a value of typ 80
µs for ramp up of internal circuits needs to be added. After t
Start the converter starts switching and ramps
VOUT.
4
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