NCP5810DMUTXG ON Semiconductor, NCP5810DMUTXG Datasheet - Page 9

• Manufacturer Part Number: NCP5810DMUTXG
• Description: IC, DUAL DC/DC CONVERTER, µDFN-12
• Manufacturer: ON Semiconductor

Specifications of NCP5810DMUTXG

• Primary Input Voltage: 4.6V
• No. Of Outputs: 2
• Output Voltage: 4.6V
• No. Of Pins: 12
• Operating Temperature Range: -40°C To +85°C
• Switching Frequency Max: 1700kHz
• Termination Type: SMD
• Mounting Style: SMD/SMT
• Package / Case: UDFN EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Detailed Descriptions
which can generate both a positive and a negative voltage.
The output voltage of the inverter is fully configurable
using external feedback resistors. The switching regulator
operates at 1.75 MHz which allows the use of small
inductors and ceramic capacitors. The both converters are
internally compensated which simplifies the design and
reduces the PCB component count. Cycle-by-cycle peak
current limit and thermal provide value added features to
protect the device.
ENABLE
The NCP5810D is a dual-output DC/DC converter
FBN
EN
FBP
FBN
1.265 V
400 k
632.5 mV
BAND GAP
1.265 V
1.75 Mhz
OPAMP
OPAMP
RAMP
COMP
-
+
SHOT
-
+
OSC
ONE
ERROR
ERROR
AMP
AMP
PROTECTION
AGND
THERMAL
623.5 mV
AGND
-
+
TSD
DETAILED OPERATING DESCRIPTION
PWM
COMPP
-
+
PWM
COMPN
Figure 15. Functional Block Diagram
+
-
ENABLE
1 ms
Timer
MAX DP
MAX DN
PGND
TSD
TSD
OORN
OORP
http://onsemi.com
IPEAK MAX N
NCP5810D
2
3
4
5
6
7
1
2
3
4
5
6
7
1
PGND
IPEAK MAX P
ONE S
OUT OFF
REGULATION
Timer
1 ms
9
CINA
1 mF
Boost Operation
to trigger the PWM controller on each rising edge (SET
signal) which starts a cycle. During this phase the low side
MN1 switch is turned on thus increasing the current
through the inductor L1. The switch current is measured by
the SENSE CURRENT and added to the RAMP COMP
signal. Then PWM COMPP compares the output of the
adder and the signal from ERROR AMP. When the
comparator threshold is exceeded, the MN1 power switch
is turned off until the rising edge of the next clock cycle. In
8
IPEAK
COMP
8
RST
SET
SET
ENABLE
RST
AVIN
The internal oscillator provides a 1.75 MHz clock signal
+
-
V Bat
-
+
2.7 to 5.5 V
PVIN
AVIN
1.265
CURRENT
True Cut-Off
Ipeak Max Threshold N
SENSE
MPO
4.7 mF
Driver
CINP
IPEAK
COMP
PIVIN
Option of powering
CURRENT
LXP
+
-
SENSE
MP1
4.7 mH
L1
MN1
Ipeak Max Threshold P
1.265 V
SCHOTTKY
SWP
VOUTP
SWN
VREF
FBP
4.7 mH
LX2
NSR0320
D1
R4
VOUTP
COUTP
4.7 mF
X5R 10V
R3
4.7 mF
X5R 10V
COUTN
VOUTN