LTC1041CS8 Linear Technology, LTC1041CS8 Datasheet - Page 4

• Manufacturer Part Number: LTC1041CS8
• Description: IC BANG-BANG CONTROLLER 8SOIC
• Manufacturer: Linear Technology

Specifications of LTC1041CS8

• Applications: Bang-Bang Controller
• Voltage - Supply: 2.8 V ~ 16 V
• Current - Supply: 1.2mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Input: -

APPLICATIO S I FOR ATIO
LTC1041
TYPICAL PERFOR A CE CHARACTERISTICS
The LTC1041 uses sampled data techniques to achieve
its unique characteristics. It consists of two comparators,
each of which has two differential inputs (Figure 1a).
When the sum of the voltages on a comparator’s inputs is
positive, the output is high and when the sum is negative,
the output is low. The inputs are interconnected such that
4
V
SET POINT
+
R
EXT
C
DELTA
EXT
GND
OSC
V
(2)
(3)
(5)
(4)
(6)
IN
GENERATOR
TIMING
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
POWER ON
0
U
V
vs Load Current
0
P-P
+
–
+
–
+
–
+
–
1
COMP A
COMP B
Output Voltage
V
+
U
2
= 2.8V
4
(a)
W
LOAD CURRENT, I
V
3
+
80 s
4
= 16V
4
U
5
W
V
6
+
L
CIRCUIT
= 5V
V
(mA)
V
+
7
V
P-P
= 10V
+
8
LTC1041 • TPC06
Figure 1. LTC1041 Block Diagram
U
9
10
LTC1041 • AI01a
V
(8)
ON/OFF
(1)
V
(7)
+
P-P
the R
V
V
hysteresis loop of 2 • DELTA centered around the
SET POINT. (See Figure 1b.)
For R
The dual differential input structure is made with CMOS
switches and a precision capacitor array. Input
impedance characteristics of the LTC1041 can be
determined from the equivalent circuit shown in Figure 2.
The input capacitance will charge with a time constant of
IN
IN
> (SET POINT + DELTA) and is set (ON/OFF = V
< (SET POINT – DELTA). This makes a very precise
S
S
10
10
10
10
< 10k
10
11
10
9
8
7
flip-flop is reset (ON/OFF = GND) when
1
R
GND
IN
V
+
vs Sampling Frequency
0V
SAMPLING FREQUENCY f
10
SET POINT
V
L
10
INPUT VOLTAGE, V
2
DELTA –
(b)
DEADBAND
S
10
+
(Hz)
DELTA
3
LTC1041 • TPC07
IN
V
10
U
4
LTC1041 • AI01b
+
) when
1041fa