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STBB2J-29 Fiches technique(PDF) 6 Page - STMicroelectronics

No de pièce STBB2J-29
Description  800 mA 2.5 MHz, high efficiency dual mode buck-boost DC-DC converter
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STBB2J-29 Fiches technique(HTML) 6 Page - STMicroelectronics

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Pin configuration
STBB2
6/25
DocID022745 Rev 9
4
Pin configuration
Figure 5. Pin connections (top view)
A4
[EN]
B4
[BP]
C4
[MODE]
D4
[VSEL]
A3
[VINA]
B3
[VINA1]
C3
[GND]
D3
[GND]
A2
[VIN]
B2
[SW1]
C2
[PGND]
D2
[SW2]
A1
[VIN]
B1
[SW1]
C1
[PGND]
D1
[SW2]
E4
[GND]
E3
[FB]
E2
[VO]
E1
[VO]
A4
[EN]
B4
[BP]
C4
[MODE]
D4
[VSEL]
A3
[VINA]
B3
[VINA1]
C3
[GND]
D3
[GND]
A2
[VIN]
B2
[SW1]
C2
[PGND]
D2
[SW2]
A1
[VIN]
B1
[SW1]
C1
[PGND]
D1
[SW2]
E4
[GND]
E3
[FB]
E2
[VO]
E1
[VO]
A4
[EN]
B4
[BP]
C4
[MODE]
D4
[VSEL]
A3
[VINA]
B3
[VINA1]
C3
[GND]
D3
[GND]
A2
[VIN]
B2
[SW1]
C2
[PGND]
D2
[SW2]
A1
[VIN]
B1
[SW1]
C1
[PGND]
D1
[SW2]
E4
[GND]
E3
[FB]
E2
[VO]
E1
[VO]
Top view
Bottom view
Table 5. Pin description
Pin name
Pin n°
Description
VOUT
E1, E2
Output voltage.
SW2
D1, D2
Switch pin - internal switches C and D are connected to this pin. Connect inductor
between SW1 to SW2.
PGND
C1, C2
Power ground.
SW1
B1, B2
Switch pin - internal switches A and B are connected to this pin. Connect inductor
between SW1 and SW2.
EN
A4
Enable pin. Connect this pin to GND or a voltage lower than 0.4 V to shut down the IC. A
voltage higher than 1.2 V is required to enable the IC. Do not leave this pin floating.
MODE
C4
When in normal operation, the MODE pin selects between auto mode and forced PWM
mode. If the MODE pin is low, the STBB2 automatically switches between pulse-skipping
and standard PWM according to the load level. If the MODE pin is pulled high, the STBB2
always works in PWM mode. Do not leave this pin floating.
VINA
A3
Supply voltage for control stage.
VINA1
B3
A 100
Ω resistor is internally connected between VIN and VINA1. Connecting a 1 µF
capacitor between VINA1 and GND.
VIN
A1, A2
Power input voltage. Connect a ceramic bypass capacitor (10 µF min.) between this pin
and PGND.
GND
C3, D3, E4 Signal ground.
FB
E3
Feedback voltage. For the fixed version this pin must be connected to VOUT.


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