NCP1729SN35T1G ON Semiconductor, NCP1729SN35T1G Datasheet - Page 16

• 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

transistors and two Schottky diodes. The output voltage is approximately equal to −V
of both transistors and the forward voltage of both diodes. The performance characteristics for the converter are shown below.
Note that the output resistance is reduced to 1.0 W.
The output current capability of the NCP1729 can be extended beyond 600 mA with the addition of two external switch
V
in
Figure 37. External Switch for Increased Negative Output Current
+
−V
−2.0
−2.2
−2.4
−2.6
−2.8
−3.0
−3.2
out
C
= V
3
0
1
2
3
Figure 38. Current Boosted Load Regulation,
in
−V
BE(Q1) −
0.1
Output Voltage vs. Output Current
OSC
I
out
V
http://onsemi.com
, OUTPUT CURRENT (mA)
BE(Q2)
0.2
NCP1729
6
5
4
−2 V
16
0.3
F
Q
Q
0.4
2
1
C
C
Q
Q
+
1
3
1
2
C
= C
= 220 mF
= PZT751
= PZT651
V
R
T
1
A
in
out
2
= 25°C
= 5.0 V
= 470 mF
= 1.0 W
0.5
in
+
minus the sum of the base emitter drops
0.6
C
2
−V
out