L6610D STMicroelectronics, L6610D Datasheet - Page 26

• Manufacturer Part Number: L6610D
• Description: IC CTRLR HOUSEKEEPING BCD 24SOIC
• Manufacturer: STMicroelectronics

Specifications of L6610D

• Applications: Programmable Housekeeping Controller
• Voltage - Supply: 4.2 V ~ 7 V
• Current - Supply: 5mA
• Operating Temperature: 0°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -

L6610
7
In fig. 26 a circuit is suggested to obtain the regulated +3.3V output with a linear configuration instead of the
Magamp circuitry.
In this case the output of the E/A modulates the gate-source voltage of a power MOS in series with the power
stage.
In fig. 27 a simple and cheap latch circuit is showed to manage an OV fault on the Auxiliary output in the same
way of an OC (UV) fault, without having recourse to a (expensive) power crowbar. By tuning the value of R
it is possible to set the voltage value that triggers the latch circuit; C
nected between the collector of Q1 and Cout pulls down the output of the auxiliary E/A: this has the same effect
of the OCP_bounce internal signal that guarantees the reduction of duty cycle.
Figure 26. Controlling a Linear Regulator with the Error Amplifier B
Figure 27. Auxiliary OVP without Crowbar
26/29
APPLICATION IDEAS
L6610
DMON
Cout
+12V
L
BAT42
R
B
D1
BC548
Q1
+5V
C
L6610
1
Bout
5K6
C
DEL
100
BC558
DEL
Q2
_
+
+1.25V
defines the turn-on delay. A diode con-
Z
C
Binv
C
R
5K6
2
SET
V
AUX
+3.3V
R
R
H
L
SET