Datasheet

TPS650250-Q1
SLVSAA7 –MARCH 2010 www.ti.com
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, T
J
= –40°C to 125°C, typical values are at T
A
= 25°C
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VDCDC3 STEP-DOWN CONVERTER
V
I
Input voltage range, VINDCDC3 2.5 6.0 V
I
O
Maximum output current V
O
= 1.6V 800 mA
Shutdown supply current in
I
SD
EN_DCDC3 = GND 0.1 1 mA
VINDCDC3
R
DS(on)
P-channel MOSFET on-resistance V
INDCDC3
= V
GS
= 3.6V 310 698 mΩ
I
LP
P-channel leakage current VINDCDC3 = 6V 0.1 2 mA
R
DS(on)
N-channel MOSFET on-resistance V
INDCDC3
= V
GS
= 3.6V 220 503 mΩ
I
LN
N-channel leakage current V
DS
= 6.0V 7 10 mA
Forward current limit (P- and
I
LIMF
2.5V < V
INDCDC3
< 6V 1.00 1.20 1.40 A
N-channel)
f
S
Oscillator frequency 1.95 2.25 2.55 MHz
Adjustable output voltage with VINDCDC3 = VDCDC3 + 0.5V (min 2.5V) to 6V;
resistor divider at DEFDCDC2 0mA ≤ I
O
≤ 0.8A –2% 2%
MODE = 0 (PWM)
VDCDC3
Adjustable output voltage with VINDCDC3 = VDCDC3 + 0.5V (min 2.5V) to 6V;
resistor divider at DEFDCDC2; 0mA ≤ I
O
≤ 0.8A –1% 1%
MODE = 1 (PWM)
VINDCDC3 = VDCDC3 + 0.3V (min. 2.5 V) to
Line regulation 0.0 %/V
6V; I
O
= 10mA
Load regulation I
O
= 10mA to 600mA 0.25 %/A
VDCDC3 ramping from 5% to 95% of target
t
SS
Soft start ramp time 750 ms
value
R(L3) Internal resistance from L3 to GND 1 MΩ
8 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS650250-Q1