Bellnix BUD Series Manual

Wide input / output, Buck-boost, ±Output DC/DC Converter
BUD series is a non-isolated DC/DC converter that features wide input / output,
buck-boost, ±output, small size (10×11×6mm). It is ideal for supplying power to analog
circuits from unstable bus voltages for batteries, unstable power supplies and so on.
■ Features
･Wide input / output
･Buck-boost type
･± Output
･Ultra small size: SMD package
･High efficiency
･Max 1.8Woutput
(Input / output voltage derating required）
･Over-power protection
･UVLO function
･Remote ON/OFFcontrol
･Equipped with skip mode at light load
･Non-isolated type
･Operating temp. Ta = -40°C to +85°C
･RoHS compliance
･Output voltage setting is determined by the
single resistor
■ Model & rating
Models Input V
BUD Series Vdc
12
BUD12-12W042
(3 to 18)
Note 1: In the measurement circuit in section 4-3.
Note 2: Unless otherwise specified the product is measured at input voltage 12V, output voltage ±12V, output power 0.5W×2, and
ambient temperature 25°C±5°C.
Note 3: Ripple noise is measured at BW=20MHz.
Note 4: The usable input / output voltage range is within the range shown in Fig. 1.
Note 5: The output voltage settings for positive and negative outputs are equal (Voutp = | Voutn |).
Note 6: Maximum output power of 1.8W (±0.9W each) can be output depending on input/ output conditions. For details, refer to section
4-4.
■ Specificatiom
Input/ output voltage range
Rated input voltage
Rated output voltage
Rated output power
Output voltage accuracy
Line regulation
Load regulation
Mutual regulation
Ripple noise
Efficiency
Standby current
Over-current protection
UVLO
Remote On/ Off
Operating temperature range
Storage temperature range
Operating humidity
Storage condition
Cooling condition
Mass
Outer dimension
＊ The above specifications are provided with rated value, unless otherwise specified.
＊ The contents provided in this data sheet may be changed at any time without prior notice.
Bellnix DC-DC Converter
Output V Output P
Vdc W
±12 1
(±3 to 18) (±0.5W each)
Refer to Figure 1.
12V
±12V
0.5W ×2
±5% max.
Refer to Table 1 (To the regulation of the input voltage range in Table 1)
Refer to Table 1 (To the regulation of Pout
100mV typ, 200mV max (10% ≤ Pout
Refer to Table 1 (Measurement frequency bandwidth 20MHz)
Refer to Table 1
0.1uA typ., 1.1uA max. (Input voltage 4.2V)
Operates at 105% or more of the rated output power, automatic restoration.
Available
Available
-40°C to +85°C
-40°C to +85°C
20 to 95%R.H. (Max. wet bulb temperature 69℃ with non-condensing)
Until being mounted, keep below 30°C/60% R.H.
Natural air cooling
0.7g
W=10 L=11 H=6 (mm) (For details refer to section 6-1)
1 Watt BUD Series
Figure 1 Input/ output voltage range
Line Reg. Load Reg.
% (max.) % (max.)
1.0 1.0
= 0.05 to 0.5W)
p,n
≤ 100%)
p,n
BDD20200930_Z02(BDD20190924_Z02)
Table 1
Ripple noise Efficiency
mVpp (typ.) % (typ.)
87.5
10
(Po=0.8W×2)
Table 2
1