C8051F960-B-GM Datasheet, PDF (77/492 Pages) Silicon Laboratories – Ultra Low Power 128K, LCD MCU Family

C8051F96x
Table 4.20. DC0 (Buck Converter) Electrical Characteristics
V_BAT = 1.8 to 3.8 V; T_A = –40 to +85 °C unless otherwise specified; Using factory-calibrated settings.
Parameter
Condition
Min Typ Max Units
Input Voltage Range
Input Supply to Output 
Voltage Differential 
(for regulation)
1.8
—
3.8
V
0.45
—
—
V
Output Voltage Range
Output Power
Inductor Value¹
Programmable from 1.8 to 3.5 V
1.8
1.9
3.5
V
V_DC = 1.8 to 3.0 V.
V_BAT  V_DC + 0.5.
—
—
250 mW
0.47 0.56 0.68
µH
Inductor Current Rating
For load currents less than 50 mA ₄₅₀
—
For load currents greater than
50 mA
550
—
—
—
mA
Output Capacitor Value²
1
2.2
10
µF
Input Capacitor²
—
4.7
—
µF
Output Load Current 
(based on output power
specification)
Load Regulation
Maximum DC Load Current
During Startup
Target output = 1.8 to 3.0 V³
Target output = 3.1 V³
Target output = 3.3 V³
Target output = 3.5 V⁴
Output = 1.9 V;
Load current up to 85 mA;
Supply range = 2.4–3.8 V
—
—
85³
—
—
70³
—
—
—
—
—
—
50³
mA
10⁴
—
0.03
— mv/mA
—
—
5
mA
Switching Clock Frequency
1.9
2.9
3.8 MHz
Notes:
1. Recommended: Inductor similar to NLV32T-R56J-PF (0.56 µH)
2. Recommended: X7R or X5R ceramic capacitors with low ESR. Example: Murata GRM21BR71C225K with
ESR < 10 m ( @ frequency > 1 MHz)
3. V_BAT  V_DC + 0.5. Auto-Bypass enabled (DC0MD.2 = 1).
4. V_BAT = 3.8 V. Auto-Bypass disabled (DC0MD.2 = 0).
Rev. 1.0
77