LTC1696ES6#TRMPBF Linear Technology, LTC1696ES6#TRMPBF Datasheet - Page 8

• Manufacturer Part Number: LTC1696ES6#TRMPBF
• Description: IC OVERVOLT PROT CTRLR SOT23-6
• Manufacturer: Linear Technology

Specifications of LTC1696ES6#TRMPBF

• Applications: Overvoltage Protection Controller
• Voltage - Supply: 2.7 V ~ 27 V
• Current - Supply: 1.1mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Input Voltage: 17V
• Output Voltage: 24V
• No. Of Outputs: 1
• Supply Voltage Range: 2.7V To 27V
• No. Of Pins: 6
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Other names: LTC1696ES6#PBF; LTC1696ES6#PBF; LTC1696ES6#TRMPBF; LTC1696ES6#TRMPBFTR

BLOCK DIAGRA
APPLICATIO S I FOR ATIO
LTC1696
Feedback Inputs
The LTC1696 has two feedback inputs that allow monitor-
ing of two output voltages. The trip point of the internal
comparator is set by an internal reference of 0.88V with
an external resistor divider network (Figure 1). The resis-
tors R1 and R2 values are calculated with the typical trip
point of 0.88V.
As an example, let’s calculate values for R1 and R2 for a
3.3V supply in which an overvoltage indication is required
8
2% accuracy. The output voltage, V
R
R
2
1
R
1
R
2
V
GND
V
FB1
FB2
S
CC
•
– .
V
3
2
1
5
S
0 88
0 88
.
0 88
U
.
+
–
•
R
BANDGAP
REFERENCE
0.88V
1
U
W
+
+
–
+
–
W
S
V
REF
, is sensed through
GLITCH
FILTER
UVLO
2V
R2
R1
U
INTERNAL 5V SUPPLY
+
–
LOGIC
at +10% (3.63V). First, a value for R1 is chosen based on
the allowable resistor divider string current. This is deter-
mined by power dissipation requirements and possible
sensitivity to noise coupling into the resistor divider. In
this exercise, assume the resistor divider current is 20 A.
R1 is calculated from:
V
S
R2
R1
–
+
+
–
FB1
1.185V
0.865V
INTERNAL 5V SUPPLY
R4
+
–
V
REF
–
+
Figure 1
LTC1696
= 0.88V
1696 BD
10 A +
FUNCTION
OF FB1 AND FB2
OVERDRIVE
R3
4
6
OUT
TIMER/
RESET