SM8131B Datasheet, PDF (5/21 Pages) Nippon Precision Circuits Inc – The SM8131B is a charge pump DC/DC converter that switches between 1 and 1.5 automatically.

V_OUT Efficiency
100
SM8131B
90
80
70
VF = 3.2V
VF = 3.4V
60
VF = 3.6V
VF = 3.8V
50
3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6
V_IN [V]
Efficiency of P_IN vs. P_OUT
(LED × 6pcs, I_LED = 20mA, I_OUT = 120mA)
100
90
80
70
VF = 3.2V
VF = 3.4V
VF = 3.6V
60
VF = 3.8V
50
3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6
V_IN [V]
Efficiency of P_IN vs. P_OUT
(LED × 3pcs, I_LED = 15mA, I_OUT = 45mA)
NIPPON PRECISION CIRCUITS INC.—5