Datasheet

TPS65930/TPS65920
www.ti.com SWCS037G–MAY 2008–REVISED APRIL 2011
4.1.1 VDD1 dc-dc Regulator
4.1.1.1 VDD1 dc-dc Regulator Characteristics
The VDD1 dc-dc regulator is a stepdown dc-dc converter with a configurable output voltage. The
programming of the output voltage and the characteristics of the dc-dc converter are
SmartReflex-compatible. The regulator can be put in sleep mode to reduce its leakage (PFM) or in
power-down mode when it is not in use. Table 4-3 describes the regulator characteristics.
Table 4-2. Part Names With Corresponding VDD1 Current Support
Device Name VDD1 Current Support
TPS65920A2ZCH (some bug fixes, see errata) 1.2 A
TPS65920A2ZCHR (some bug fixes, see errata) 1.2 A
TPS65930A2ZCH (some bug fixes, see errata) 1.2 A
TPS65930A2ZCHR (some bug fixes, see errata) 1.2 A
Table 4-3. VDD1 dc-dc Regulator Characteristics
Parameter Comments Min Typ Max Unit
Input voltage range 2.7 3.6 4.5 V
Output voltage 0.6 1.45 V
Output voltage step Covering the 0.6-V to 1.45-V range 12.5 mV
Output accuracy
(1)
0.6 V to < 0.8 V –6% 6%
0.8 V to 1.45 V –4% 4%
Switching frequency 3.2 MHz
I
O
= 10 mA, sleep 82%
Conversion efficiency
(2)
, Figure 4-2 in active
100 mA < I
O
< 400 mA 85%
mode
400 mA < I
O
< 600 mA 80%
600 mA < I
O
< 800 mA 75%
Active mode 1.2 A
Output current
Sleep mode 10 mA
Ground current (I
Q
) Off at 30°C 3 μA
Sleep, unloaded 30 50
Active, unloaded, not switching 300
Short-circuit current V
IN
= V
Max
2.2 A
Load regulation 0 < I
O
< I
Max
20 mV
I
O
= 10 mA to (I
Max
/2) + 10 mA,
Transient load regulation
(3)
–65 50 mV
Maximum slew rate is I
Max
/2/100 ns
Line regulation 10 mV
Transient line regulation 300 mV
PP
ac input, 10-μs rise and fall time 10 mV
Start-up time 0.25 1 ms
Recovery time From sleep mode to on mode with constant <10 100 μs
load
Slew rate (rising or falling)
(4)
4 8 16 mV/μs
Output shunt resistor (pulldown) 500 700 Ω
Value 0.7 1 1.3 μH
External coil Data capture record (DCR) 0.1 Ω
Saturation current 1.8 A
(1) Accuracy includes all variations (line and load regulations, line and load transients, temperature, and process)
(2) VBAT = 3.8 V, VDD1 = 1.3 V, Fs = 3.2 MHz, L = 1 μH, L
DCR
= 100 mΩ, C = 10 μF, ESR = 10 mΩ
(3) Output voltage must discharge the load current completely and settle to its final value within 100 μs.
(4) Load current varies proportionally with the output voltage. The slew rate is for increasing and decreasing voltages, and the maximum
load current is 1.1 A.
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