E-L6919ETR STMicroelectronics, E-L6919ETR Datasheet - Page 7

• 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

PIN FUNCTION (continued)
18-22
17
23
24
25
26
27
28
N
OSC/INH
PHASE2
UGATE2
PGOOD
LGATE2
BOOT2
VID4-0
FAULT
PGND
Name
Oscillator pin.
It allows programming the switching frequency of each channel: the equivalent switching
frequency at the load side results in being doubled.
Internally fixed at 1.24V, the frequency is varied proportionally to the current sunk (forced) from
(into) the pin with an internal gain of 6kHz/ A (See relevant section for details). If the pin is not
connected, the switching frequency is 150kHz for each channel (300kHz on the load).
The pin is forced high (5V Typ.) when an Over/Under Voltage is detected; to recover from this
condition, cycle VCC.
Forcing the pin to a voltage lower than 0.6V, the device stop operation and enter the inhibit
state.
Voltage IDentification pins.
Internally pulled-up, connect to GND to program a ‘0’ while leave floating to program a ‘1’.
They are used to program the output voltage as specified in Table 1 and to set the PGOOD,
OVP and UVP thresholds.
The device automatically regulates 25mV higher than the HAMMER DAC avoiding the use of
any external set-up resistor.
This pin is an open collector output and is pulled low if the output voltage is not within the above
specified thresholds and during soft start. It cannot be pulled-up above 5V.
If not used may be left floating.
Channel 2 HS driver supply. This pin supplies the relative high side driver.
Connect through a capacitor (100nF typ.) to the PHASE2 pin and through a diode to VCC
(cathode vs. boot).
Channel 2 HS driver output.
A little series resistor helps in reducing device-dissipated power.
Channel 2 HS driver return path. It must be connected to the HS2 mosfet source and provides
the return path for the HS driver of channel 2.
Channel 2 LS driver output.
A little series resistor helps in reducing device-dissipated power.
LS drivers return path.
This pin is common to both sections and it must be connected through the closest path to the
LS mosfets source pins in order to reduce the noise injection into the device.
Description
L6919E
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