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The device is a pwm controller for high performance dc-dc conversion from 3.3V, 5V and 12V buses.
The output voltage is adjustable down to 0.9V; higher voltages can be obtained with an external voltage divider.
High peak current gate drivers provide for fast switching to the external power section, and the output current can be in excess of 20A.
The device assures protections against load overcurrent and overvoltage. An internal crowbar is also provided turning on the low side mosfet as long as the over-voltage is detected. In case of over-current detection, the soft start capacitor is discharged and the system works in HICCUP mode.
L6910 Maximum Ratings
Symbol
Parameter
Value
Unit
VCC
VCC to GND, PGND
15
V
VBOOT-VPHASE
Boot Voltage
15
V
VHGATE-VPHASE
15
V
OCSET, LGATE, PHASE
-0.3 to Vcc+0.3
V
SS, FB, PGOOD, VREF, EAREF, RT
7
V
COMP
6.5
V
Tj
Junction Temperature Range
-40 to 150
°C
Tstg
Storage temperature range
-40 to 150
°C
Ptot
Maximum power dissipation at Tamb = 25°C
1
W
L6910 Features
· OPERATING SUPPLY VOLTAGE FROM 5V TO 12V BUSES · UP TO 1.3A GATE CURRENT CAPABILITY · ADJUSTABLE OUTPUT VOLTAGE · N-INVERTING E/A INPUT AVAILABLE · 0.9V ±1.5% VOLTAGE REFERENCE · VOLTAGE MODE PWM CONTROL · VERY FAST LOAD TRANSIENT RESPONSE · 0% TO 100% DUTY CYCLE · POWER GOOD OUTPUT · OVERVOLTAGE PROTECTION · HICCUP OVERCURRENT PROTECTION · 200kHz INTERNAL OSCILLATOR · OSCILLATOR EXTERNALLY ADJUSTABLE FROM 50kHz TO 1MHz · SOFT START AND INHIBIT · PACKAGES: SO-16 & HTSSOP16
L6910 Typical Application
· SUPPLY FOR MEMORIES AND TERMINATIONS · COMPUTER ADD-ON CARDS · LOW VOLTAGE DISTRIBUTED DC-DC · MAG-AMP REPLACEMENT
L6910 Connection Diagram
L6910A Parameters
Technical/Catalog Information
L6910A
Vendor
STMicroelectronics
Category
Integrated Circuits (ICs)
PWM Type
Voltage Mode
Number of Outputs
1
Package / Case
16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
Packaging
Tube
Duty Cycle
100%
Voltage - Supply
4 V ~ 15 V
Frequency-Max
1MHz
Buck
Yes
Boost
Yes
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Drawing Number
*
Operating Temperature
-40°C ~ 150°C
Lead Free Status
Lead Free
RoHS Status
RoHS Compliant
Other Names
L6910A L6910A
L6910A General Description
The device is a pwm controller for high performance dc-dc conversion from 3.3V, 5V and 12V buses.
The output voltage is adjustable down to 0.9V; higher voltages can be obtained with an external voltage divider.
High peak current gate drivers provide for fast switching to the external power section, and the output current can be in excess of 20A.
The device assures protections against load overcurrent and overvoltage. An internal crowbar is also provided turning on the low side mosfet as long as the over-voltage is detected. In case of over-current detection, the soft start capacitor is discharged and the system works in HICCUP mode.
L6910A Maximum Ratings
Symbol
Parameter
Value
Unit
VCC
VCC to GND, PGND
15
V
VBOOT-VPHASE
Boot Voltage
15
V
VHGATE-VPHASE
15
V
OCSET, LGATE, PHASE
-0.3 to Vcc+0.3
V
SS, FB, PGOOD, VREF, EAREF, RT
7
V
COMP
6.5
V
Tj
Junction Temperature Range
-40 to 150
°C
Tstg
Storage temperature range
-40 to 150
°C
Ptot
Maximum power dissipation at Tamb = 25°C
1
W
L6910A Features
· OPERATING SUPPLY VOLTAGE FROM 5V TO 12V BUSES · UP TO 1.3A GATE CURRENT CAPABILITY · ADJUSTABLE OUTPUT VOLTAGE · N-INVERTING E/A INPUT AVAILABLE · 0.9V ±1.5% VOLTAGE REFERENCE · VOLTAGE MODE PWM CONTROL · VERY FAST LOAD TRANSIENT RESPONSE · 0% TO 100% DUTY CYCLE · POWER GOOD OUTPUT · OVERVOLTAGE PROTECTION · HICCUP OVERCURRENT PROTECTION · 200kHz INTERNAL OSCILLATOR · OSCILLATOR EXTERNALLY ADJUSTABLE FROM 50kHz TO 1MHz · SOFT START AND INHIBIT · PACKAGES: SO-16 & HTSSOP16
L6910A Typical Application
· SUPPLY FOR MEMORIES AND TERMINATIONS · COMPUTER ADD-ON CARDS · LOW VOLTAGE DISTRIBUTED DC-DC · MAG-AMP REPLACEMENT