Datasheet

TPS65720
TPS65721
www.ti.com SLVS979 –OCTOBER 2009
RECOMMENDED OPERATING CONDITIONS (continued)
MIN NOM MAX UNIT
C
INAC
Input capacitor at AC
(1)
0.1 1 μF
C
BAT
Capacitor at BAT
(1)
0.1 4.7 μF
C
SYS
Capacitor at SYS
(1)
4.7 10 μF
C
INDCDC1
Input capacitor at V
INDCDC1
(1)
; if connected to SYS, only one 4.7μF cap required for 4.7 μF
SYS and CINDCDC1
C
OUTDCDC1
Output capacitor at V
DCDC1
(1)
4.7 10 22 μF
C
INLDO1
Input capacitor at VINLDO1
(1)
2.2 μF
C
OUTLDO1
Output capacitor at LDO1
(1)
2.2 μF
R
ISET
Minimum R
ISET
value for proper operation; lower values may trigger the short circuit 700 Ω
protection on ISET
T
A
Operating ambient temperature –40 85 °C
T
J
Operating junction temperature –40 125 °C
ELECTRICAL CHARACTERISTICS
V
SYS
= 3.6V, V
DCDC1
= 2.05V, PFM mode, L = 3.3μH, C
OUTDCDC1
= 4.7μF, V
INLDO1
=2.05V, V
LDO1
=1.85V, T
A
= –40°C to 85°C
typical values apply in a temperature range of 10°C to 35°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
DCDC1 enabled, IOUT = 0mA. PFM mode enabled; device not
36 45 μA
Operating quiescent current when only DCDC1
switching
I
Q
converter is enabled
DCDC1 enabled, IOUT = 0mA. PWM mode 2.8 mA
Current into BAT pin (PFM mode) 33 50 μA
Operating quiescent current when LDO1 and
I
Q
DCDC1 are enabled
Current into VINLDO1 13 18 μA
Shutdown current after voltage was applied to BAT For VINLDO1=0V (LDO1 supplied by DCDC1); powered by
4 13 μA
but device never enabled before (shipping mode) VBAT=3.6V
For VINLDO1=0V (LDO1 supplied by DCDC1); powered by
I
SD
Shutdown current after first power-up 12 17 μA
VBAT=3.6V
For VINLDO1≠0V (LDO1 supplied by SYS); powered by
Shutdown current after first power-up 12 18 μA
VBAT=3.6V
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