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PDF STBB2 Data sheet ( Hoja de datos )
| Número de pieza | STBB2 | |
| Descripción | 800 mA 2.5 MHz high efficiency dual mode buck-boost DC-DC converter | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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STBB2
800 mA 2.5 MHz, high efficiency dual mode
buck-boost DC-DC converter
Datasheet - production data
• Cellular phones
Flip Chip 20 (2.1 x 1.8 mm)
Features
• Operating input voltage range from 2.4 V to
5.5 V
• ± 2% output voltage tolerance over process
and temperature variations
• Bypass power save function
• Selectable output voltage with dedicated VSEL
pin
• Very fast line and load transients
• 2.5 MHz switching frequency
• Power save mode (PS) at light load
• Typical efficiency higher than 90%
• 50 µA max. quiescent current
• Flip Chip 20 bumps 0.4 mm pitch 2.1 x 1.8 mm
Description
The STBB2 is a fixed frequency, high efficiency,
buck-boost DC-DC converter which provides
output voltages from 1.2 V to 4.5 V starting from
input voltage from 2.4 V to 5.5 V. The device can
operate with input voltages higher than, equal to,
or lower than the output voltage making the
product suitable for single Li-Ion, multi-cell
alkaline or NiMH applications where the output
voltage is within the battery voltage range. The
low-RDS(on) N-channel and P-channel MOSFET
switches are integrated and help to achieve high
efficiency. The MODE pin allows the selection
between auto mode and forced PWM mode,
taking advantage from either lower power
consumption or best dynamic performance. The
bypass function allows the battery power saving.
In this operating mode, the high-side switches are
turned on so that the output voltage is equal to the
input voltage; in this condition the current
consumption is reduced to a maximum of 5 µA.
The device also includes soft-start control,
thermal shutdown, and current limit. The STBB2
is packaged in Flip Chip 20 bumps with 0.4 mm
pitch.
Applications
• Memory card supply
Order codes
STBB2JAD-R
STBB2J29-R
STBB2J30-R
Table 1. Device summary
Markings
Packaging
BB2 Tape and reel
B229
Tape and reel
B230
Tape and reel
Output voltages
Adjustable
2.9 V / 3.4 V
3.0 V / 3.3 V
February 2014
This is information on a product in full production.
DocID022745 Rev 9
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www.st.com
25
http://www.Datasheet4U.com
1 page  
STBB2
3 Ab
solute maximum ratings
Absolute maximum ratings
Symbol
VIN, VINA, VINA1
SW1,SW2
VOUT
MODE, EN, BP, VSEL
FB
ESD
TAMB
TJ
TSTG
Table 3. Absolute maximum ratings
Parameter
Supply voltage
Switching nodes
Output voltage
Logic pins
Feedback pin
Human body model
Charged device model
Operating ambient temperature
Maximum operating junction temperature
Storage temperature
Value
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 6.0
± 2000
± 500
-40 to 85
150
-65 to 150
Unit
V
V
V
V
V
V
°C
°C
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 4. Thermal data
Symbol
Parameter
RthJA
Thermal resistance junction-ambient
1. PCB condition: JEDEC standard 2s2P(4-layer).
Value
80 (1)
Unit
°C/W
DocID022745 Rev 9
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5 Page 
STBB2
Typical performance characteristics
Figure 7. Efficiency vs. output current (power save mode enabled VOUT = 3.4 V)
100
90
80
70
60 VOUT = 3.4 V
50
40
30
20 Power save m ode enabled
10
Vin = 2.5 V
Vin = 3.6 V
Vin = 4.5 V
0
1 10 100 1000
IOUT [mA ]
AM01436v1
Figure 8. Efficiency vs. output current (power save mode disabled VOUT = 3.4 V)
100
AM10437v1
90
80
70
60 VOUT = 3.4 V
50
40
30
20
10
0
1
Power save mode disabled
10
100
Vin = 2.5V
Vin = 3.6V
Vin = 4.5V
1000
IOUT [mA ]
Figure 9. Efficiency vs. output current (power save mode enabled VOUT = 2.9 V)
100
AM10438v1
90
80
70
60 VOUT = 2.9 V
50
40
30
20 Power save m ode en abled
10
Vin = 2.5V
Vin = 3.6V
Vin = 4.5V
0
1 10 100 1000
IOUT [mA]
DocID022745 Rev 9
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11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet STBB2.PDF ] | |
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