Datasheet

ELECTRICAL CHARACTERISTICS
TPS650240 , , TPS650241
TPS650242 , TPS650243
TPS650244 , TPS650245
www.ti.com .............................................................................................................................................................. SLVS774B – JUNE 2007 – REVISED JULY 2009
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, 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
VDCDC1 STEP-DOWN CONVERTER
V
VINDCDC1
Input voltage range 2.5 6.0 V
I
O
Maximum output current for V
O
= 3.3V 1000 mA
TPS650240, TPS650242 and
TPS650245
I
O
Maximum output current for TPS650241 V
O
= 3.3V 1600 mA
and TPS650243
I
O
Maximum output current for TPS650244 V
O
= 3.3V 800 mA
I
SD
Shutdown supply current in VINDCDC1 EN_DCDC1 = GND 0.1 1 µ A
R
DS(ON)
P-channel MOSFET on-resistance VINDCDC1 = VGS = 3.6V 125 261 m Ω
I
LP
P-channel leakage current VINDCDC1 = 6.0V 2 µ A
R
DS(ON)
N-channel MOSFET on-resistance VINDCDC1 = VGS = 3.6V 130 260 m Ω
I
LN
N-channel leakage current V
DS
= 6.0V 7 10 µ A
I
LIMF
Forward current limit (P- and N-channel) 2.5V < V
INMAIN
< 6.0V 0.98 1.10 1.21 A
for TPS650244
I
LIMF
Forward current limit (P- and N-channel) 2.5V < V
INMAIN
< 6.0V 1.15 1.30 1.39 A
for TPS650240, TPS650242 and
TPS650245
I
LIMF
Forward current limit (P- and N-channel) 2.5V < V
INMAIN
< 6.0V 1.75 1.97 2.15 A
for TPS650241 and TPS650243
f
S
Oscillator frequency 1.95 2.25 2.55 MHz
VDCDC1 Fixed output voltage 2.80V VINDCDC1 = 3.3V to 6.0V; – 2% 2%
MODE=0 (PWM/PFM) 0 mA ≤ I
O
≤ 1.6A
3.3V – 2% 2%
Fixed output voltage 2.80V VINDCDC1 = 3.7V to 6.0V; – 1% 1%
MODE=1 (PWM) 0 mA ≤ I
O
≤ 1.6A
3.3V – 1% 1%
Adjustable output voltage with resistor VINDCDC1 = VDCDC1 +0.4V (min 2.5V) – 2% 2%
divider at DEFDCDC1 MODE = 0 to 6.0V; 0mA ≤ I
O
≤ 1.6A
(PWM/PFM)
Adjustable output voltage with resistor VINDCDC1 = VDCDC1 +0.4V (min 2.5V) – 1% 1%
divider at DEFDCDC1; MODE = 1 to 6.0V; 0mA ≤ I
O
≤ 1.6A
(PWM)
Line regulation VINDCDC1 = VDCDC1 + 0.3V (min. 2.5 V) 0.0 %/V
to 6.0V; I
O
= 10mA
Load regulation I
O
= 10mA to 1.6A 0.25 %/A
T
SS
Soft start ramp time VDCDC1 ramping from 5% to 95% of 750 µ s
target value
R(L1) Internal resistance from L1 to GND 1 M Ω
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Product Folder Link(s): TPS650240 TPS650241 TPS650242 TPS650243 TPS650244 TPS650245