NCP1729SN35T1G ON Semiconductor, NCP1729SN35T1G Datasheet - Page 14

• Manufacturer Part Number: NCP1729SN35T1G
• Description: IC INVERTER SWITCHED CAP 6TSOP
• Manufacturer: ON Semiconductor
• Type: Switched Capacitor (Charge Pump), Invertingr

Specifications of NCP1729SN35T1G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: -1.15 ~ -5.5 V, 2.3 ~ 11 V
• Current - Output: 50mA
• Frequency - Switching: 35kHz
• Voltage - Input: 1.15 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SC-74-6
• Power - Output: 313mW
• Function: Inverting
• Output Voltage: - 5.5 V to - 1.15 V
• Output Current: 100 mA
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage (min): 1.15V
• Operating Supply Voltage (max): 5.5V
• Package Type: TSOP
• Pin Count: 6
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NCP1729SN35T1GOS; NCP1729SN35T1GOS; NCP1729SN35T1GOSTR

shunt regulator acts as a comparator with a precise input offset voltage which significantly reduces the converter’s output
resistance and dramatically enhances the line and load regulation. For closed loop operation, the desired regulated output
voltage must be lower in magnitude than −V
regulator can be from either the TLV431 or TL431 families. The comparator offset or reference voltage is 1.25 V or 2.5 V
respectively. The performance characteristics for the converter are shown below. Note that the dashed curve sections represent
the converter’s open loop performance.
An adjustable shunt regulator can be used with the shutdown input to give excellent closed loop regulation performance. The
−1.0
−2.0
−3.0
−4.0
−5.0
0
Figure 33. Load Regulation, Output Voltage vs.
T
Curve
A
A
B
= 25°C
10
I
V
out
20
in
3.0
5.0
, OUTPUT CURRENT (mA)
(V)
V
Output Current
in
30
Figure 32. Line and Load Regulated Negative Output Voltage
A
R
10 k
10 k
1
(W)
+
40
R
5.0 k
24 k
1
2
3
2
50
(W)
B
in
Capacitors = 3.3 mF
. The output will regulate at a level of −V
OSC
10 k
V
60
http://onsemi.com
out
−1.8
−4.2
(V)
NCP1729
70
6
5
4
14
−0.5
−1.5
−2.5
−3.5
−4.5
1.0
Figure 34. Line Regulation, Output Voltage vs.
+
2.0
R
R
1
2
V
in
ref
, INPUT VOLTAGE (V)
Input Current
+
3.0
(R
2
−V
/R
out
1
+ 1). The adjustable shunt
4.0
I
R
R
T
out
A
1
2
= 25°C
= 10 k
= 24 k
= 25 mA
5.0
6.0