STBB1XX STMicroelectronics, STBB1XX Datasheet - Page 5

• Manufacturer Part Number: STBB1XX
• Description: 1 A, high efficiency single inductor dual mode buck-boost DC-DC converter
• Manufacturer: STMicroelectronics

Specifications of STBB1XX

• Typical Efficiency: > 94 %

STBB1XX
3
Figure 2.
Table 4.
Pin n°
10
1
2
3
4
5
6
7
8
9
Pin configuration
Pin connections (top through view)
Pin description
Exposed pad
Symbol
(SYNC)
MODE
PGND
VOUT
VINA
SW2
SW1
GND
VIN
EN
FB
Output voltage
Switch pin - Internal switches are connected to this pin. Connect inductor
between SW1 to SW2
Power ground
Switch pin - Internal switches are connected to this pin. Connect inductor
between SW1 and SW2
Power input voltage. Connect a ceramic bypass capacitor (10 µF minimum)
between this pin and PGND
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.
Operation mode selection.
If MODE pin is low, the STBB1 automatically switches between pulse skipping
and fixed frequency PWM according to the load level.
If MODE pin is pulled high, the STBB1 works always in PWM mode.
When a square waveform is applied, this pin provides the clock signal for
oscillator synchronization
Supply voltage for control stage
Signal ground
Feedback voltage
Power ground
Doc ID 15474 Rev 5
Name and function
Pin configuration
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