Datasheet

TPS65022
www.ti.com SLVS667A –JULY 2006– REVISED SEPTEMBER 2011
ELECTRICAL CHARACTERISTICS
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6 V, VBACKUP = 3 V, 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
VDCDC3 STEP-DOWN CONVERTER
V
I
Input voltage range, VINDCDC3 2.5 6 V
I
O
Maximum output current 900 mA
I
(SD)
Shutdown supply current in VINDCDC3 DCDC3_EN = GND 0.1 1 μA
r
DS(on)
P-channel MOSFET on-resistance VINDCDC3 = V
(GS)
= 3.6 V 310 698 mΩ
I
lkg
P-channel leakage current VINDCDC3 = 6 V 0.1 2 μA
r
DS(on)
N-channel MOSFET on-resistance VINDCDC3 = V
(GS)
= 3.6 V 220 503 mΩ
I
lkg
N-channel leakage current V
(DS)
= 6 V 7 10 μA
Forward current limit (P- and N-channel) 2.5 V < VINDCDC3 < 6 V 1.15 1.34 1.52 A
f
S
Oscillator frequency 1.3 1.5 1.7 MHz
Fixed output voltage VINDCDC3 = 2.5 V to 6 V;
–2% 2%
FPWMDCDC3=0 0 mA ≤ I
O
≤ 800 mA
All VDCDC3
Fixed output voltage VINDCDC3 = 2.5 V to 6 V;
–1% 1%
FPWMDCDC3=1 0 mA ≤ I
O
≤ 800 mA
Adjustable output voltage with resistor VINDCDC3 = VDCDC3 + 0.5 V (min 2.5 V)
–2% 2%
divider at DEFDCDC3 FPWMDCDC3=0 to 6 V; 0 mA ≤ I
O
≤ 800 mA
Adjustable output voltage with resistor VINDCDC3 = VDCDC3 + 0.5 V (min 2.5 V)
–1% 1%
divider at DEFDCDC3; FPWMDCDC3=1 to 6 V; 0 mA ≤ I
O
≤ 800 mA
VINDCDC3 = VDCDC3 + 0.3 V (min. 2.5 V)
Line Regulation 0 %/V
to 6 V; I
O
= 10 mA
Load Regulation I
O
= 10 mA to 400 mA 0.25 %/A
VDCDC3 ramping from 5% to 95% of target
Soft start ramp time 750 μs
value
Internal resistance from L3 to GND 1 MΩ
VDCDC3 discharge resistance DCDC3 discharge =1 300 Ω
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