E-L6919ETR STMicroelectronics, E-L6919ETR Datasheet - Page 25

• Manufacturer Part Number: E-L6919ETR
• Description: IC CTRLR 5BIT PROG 2PHASE 28SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of E-L6919ETR

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 1.55 V
• Current - Output: 2A
• Frequency - Switching: 150kHz
• Voltage - Input: 5 ~ 12 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Power - Output: 2W
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 6.5 V
• Maximum Operating Temperature: 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4592-2

Two main configurations can be distinguished: Single Supply (VCC=VIN=12V) and Double Supply (VCC=12V
VIN=5V or different).
– Single Supply: In this case JP6 has to be completely shorted. The device is supplied with the same rail
– Double Supply: In this case VCC supply directly the controller (12V) while V
Some examples are reported in the following Figures 21 and 22.
Figure 21. Jumpers configuration: Double Supply
Figure 22. Jumpers configuration: Single Supply
that is used for the conversion. With an additional zener diode DZ1 a lower voltage can be derived to
supply the mosfets driver if Logic level mosfet are used. In this case JP1 must be left open so that the
HS driver is supplied with V
the right to use V
and JP2 can be freely shorted in one of the two positions.
for the power conversion. This last one can start indifferently from the 5V bus (Typ.) or from other buses
allowing maximum flexibility in the power conversion. Supply for the mosfet driver can be programmed
through the jumpers JP1, JP2 and JP6 as previously illustrated. JP6 selects now V
on the requirements.
IN
-V
Vcc = 12V
Vcc = 12V
Vcc = Open
Vcc = Open
DZ1
Vin = 5V
Vin = 5V
Vin = 12V
Vin = 12V
GNDin
GNDin
GNDcc
GNDcc
GNDin
GNDin
GNDcc
GNDcc
to supply the LS driver through VCCDR pin. Otherwise, JP1 must be shorted
IN
-V
DZ1
JP6
JP6
JP6
JP6
through BOOTx and JP2 must be shorted to the left to use V
(a) V
(b) V
(a) V
(b) V
CC
CC
CC
CC
= V
= 12V; V
= V
= V
IN
BOOTx
IN
DZ1 6.8V
DZ1
DZ1
= VCCDR = 12V; V
DZ1
= V
JP1
JP1
BOOTx
JP1
JP1
= VCCDR = 12V; V
BOOTx
JP2
JP2
= VCCDR = V
= VCCDR = 12V
JP2
JP2
VCCDR (LS Supply) = 12V
HS Supply = 5V
HS Supply = 12V
Vcc = 12V
HS Drains = 5V
Vcc = 12V
HS Drains = 5V
VCCDR (LS Supply) = 5V
VCCDR (LS Supply) = 12V
VCCDR (LS Supply) = 12V
HS Supply = 5.2V
BOOTx
HS Supply = 12V
Vcc = 12V
HS Drains = 12V
Vcc = 12V
HS Drains = 12V
IN
IN
= 5.2V
= 5V
= 5V
IN
supplies the HS drains
CC
or V
IN
depending
L6919E
IN
25/33
or to