Datasheet

TPS62400, TPS62401
TPS62402, TPS62403, TPS62404
SLVS681E –JUNE 2006–REVISED APRIL 2010 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
V
IN
= 3.6V, V
OUT
= 1.8V, EN = V
IN
, MODE = GND, L = 2.2mH, C
OUT
= 20mF, T
A
= –40°C to 85°C typical values are at
T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
2x
t
L_LB
Low time low bit, logic 0 detection Signal level on MODE/DATA pin < 0.4V 400 ms
t
H_LB
t
L_HB
Low time high bit, logic 1 detection Signal level on MODE/DATA pin < 0.4V 2 200 ms
2x
t
H_HB
High time high bit, logic 1 detection Signal level on MODE/DATA pin is > 1.2V 400 ms
t
L_HB
T
EOS
End of Stream T
EOS
2 ms
Duration of acknowledge condition
t
ACKN
(MODE/DATE line pulled low by the V
IN
2.5V to 6V 400 520 ms
device)
t
valACK
Acknowledge valid time 2 ms
t
timeout
Timeout for entering power save mode MODE/DATA Pin changes from high to low 520 ms
POWER SWITCH
P-Channel MOSFET on-resistance,
R
DS(ON)
V
IN
= V
GS
= 3.6V 280 620 mΩ
Converter 1,2
I
LK_PMOS
P-Channel leakage current V
DS
= 6.0V 1 mA
N-Channel MOSFET on-resistance
R
DS(ON)
V
IN
= V
GS
= 3.6V 200 450 mΩ
Converter 1,2
Includes N-Chanel leakage current,
I
LK_SW1/SW2
Leakage current into SW1/SW2 pin 6 7.5 mA
V
IN
= open, V
SW
= 6.0V, EN = GND
(4)
OUTPUT 1 0.68 0.8 0.92
Forward Current Limit
I
LIMF
2.5V ≤ V
IN
≤ 6.0V A
PMOS and NMOS
OUTPUT 2 0.85 1.0 1.15
T
SD
Thermal shutdown Increasing junction temperature 150 °C
Thermal shutdown hysteresis Decreasing junction temperature 20 °C
OSCILLATOR
fSW Oscillator frequency 2.5V ≤ VIN ≤ 6V 2.0 2.25 2.5 MHz
OUTPUT
V
OUT
Adjustable output voltage range 0.6 V
IN
V
V
ref
Reference voltage 600 mV
Voltage positioning active,
MODE/DATA = GND, 1.01
V
OUT (PFM)
–1.5% 2.5%
device operating in PFM mode, V
OUT
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)
V
IN
= 2.5V to 6.0V, Mode/Data = V
IN
,
V
OUT(PWM)
Fixed PWM operation,
–1% 0% 1%
0mA < I
OUT1
< 400mA ; 0mA < I
OUT2
<
600mA
(8)
DC output voltage load regulation PWM operation mode 0.5 %/A
t
Start up
Start-up time Activation time to start switching
(9)
170 ms
t
Ramp
V
OUT
Ramp UP time Time to ramp from 5% to 95% of V
OUT
750 ms
(4) On pins SW1 and SW2 an internal resistor of 1MΩ is connected to GND.
(5) Output voltage specification does not include tolerance of external voltage programming resistors
(6) Configuration L typ 2.2mH, C
OUT
typ 20mF, 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 I
PSM
= V
IN
/32Ω.
(8) For V
OUT
> 2V, V
IN
min = V
OUT
+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 ms for ramp up of internal circuits needs to be added. After t
Start
the converter starts switching and ramps
V
OUT
.
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