Datasheet

V
IN
− Input Voltage − V
500
750
1000
1250
1500
1750
2000
2250
2500
1.75 2.25 2.75 3.25 3.75 4.25 4.75 5.25
I
(MAX
) − Maximum Total Current − mA
G002
Typical
Conservative
250 kHz
1 MHz
TPS2500, TPS2501
SLVS886C –OCTOBER 2008–REVISED AUGUST 2010 www.ti.com
typical plot assumes nominal conditions—2.2 mH inductor, 1-MHz/250-kHz switching frequency, nominal
MOSFET on-resistances. The conservative plot assumes more pessimistic conditions—1.7 mH inductor,
925-kHz/230-kHz switching frequency, and maximum MOSFET on-resistances. The graph accounts for the
frequency change from 1-MHz to 250-kHz when V
IN
> V
LFM
(4.35 V typical) and for the no-frequency mode when
V
IN
> V
NFM
(5.05 V typical), which explains the discontinuities of the graph.
Table 2. Maximum Total DC/DC Current (I
AUX
+ I
USB
) at Common Input Voltages
Maximum Total Output Current (I
AUX
+ I
USB
)
Input Voltage (V)
Conservative (mA) Typical (mA)
1.8 599 757
2.5 916 1113
2.7 1008 1216
3 1148 1374
3.3 1308 1536
3.6 1445 1704
4.35 1241 1730
4.5 1364 1858
4.75 1593 2093
5.05 2300 2300
5.25 2300 2300
SPACE ADDED
SPACE ADDED
SPACE ADDED
MAXIMUM TOTAL (AUXILIARY + USB) CURRENT
vs
INPUT VOLTAGE
Figure 12. Maximum Total DC/DC Current vs. Input Voltage
14 Submit Documentation Feedback Copyright © 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2500 TPS2501