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PDF STBB3J Data sheet ( Hoja de datos )
| Número de pieza | STBB3J | |
| Descripción | high efficiency single inductor buck-boost DC-DC converter | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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STBB3J
2 A, high efficiency single inductor
buck-boost DC-DC converter
Datasheet - production data
Flip Chip 20, pitch = 0.4 mm
Features
• Input voltage range from 1.8 V to 5.5 V
• 2 A output current at 3.3 V in buck mode (VIN=
3.6 V to 5.5 V)
• 800 mA output current at 3.3 V in boost mode
(VIN 2.0 V)
• Typical efficiency higher than 94%
• ± 2% DC feedback voltage tolerance
• Automatic transition between step-down and
boost mode
• Adjustable output voltage from 1.2 V to 5.5 V
• Power save mode (PS) at light load
• 2.0 MHz fixed switching frequency
• Adjustable switching frequency up to 2.4 MHz
(by external synchronous square signal)
• Device quiescent current less than 50 μA
• Load disconnect during shutdown
• Shutdown function and soft-start
• Shutdown current < 1 μA
• Available in Flip Chip 20, pitch = 0.4 mm
Applications
• Single cell Li-Ion, two-cell and three-cell
alkaline, Ni-MH powered devices
• Memory card supply
• Tablet, smartphones
• Digital cameras
Description
The STBB3J is a fixed frequency, high efficiency,
buck-boost DC-DC converter which provides
output voltages from 1.2 V to 5.5 V starting from
input voltage from 1.8 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 cell lithium-Ion 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
contribute 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 device also includes soft-start
control, thermal shutdown, and current limit. The
STBB3J is packaged in Flip Chip 20 bumps with
2.5 x 1.75 mm.
Order code
STBB3JR
Table 1. Device summary
Part number
Marking
Packing
STBB3J
BB3 Flip Chip 20
Output voltage
Adjustable
December 2015
This is information on a product in full production.
DocID025263 Rev 5
1/25
www.st.com
25
1 page  
STBB3J
2 Block diagram
Figure 2. Block diagram adjustable
SW1
SW2
V IN
Block diagram
VOUT
FB
GND
Σ OSC
G ate
Driver
DMD
-
EA
+
V R E F and
S oft-start
VS UM
C-OMP 1
B urst
C ontrol
LOG IC
CONTR OL
UVLO
S HUT
DOW N
OS C
OTP
OS C
-
DMD
VS UM
DE VIC E
CONTR OL
V INA
EN
MO D E
AM16822v1
DocID025263 Rev 5
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5 Page 
STBB3J
Typical performance characteristics
Figure 5. Efficiency vs. output current (power Figure 6. Efficiency vs. output current (power
save mode enabled VOUT = 3.3 V)
save mode disabled VOUT = 3.3 V)
AM16825v1
Figure 7. Efficiency vs. output current
(PWM/auto mode VIN = 1.8 V)
AM16826v1
Figure 8. Efficiency vs. output current
(PWM/auto mode VIN = 3.6 V)
AM16827v1
AM16828v1
Figure 9. Efficiency vs. output current
(PWM/auto mode VIN = 5.0 V)
Figure 10. Maximum output current vs. input
voltage
AM16829v1
AM16830v1
DocID025263 Rev 5
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11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet STBB3J.PDF ] | |
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