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NR119E Datasheet Preview

NR119E Datasheet

Buck Converter

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31 V, Buck Converter
NR110E Series
Data Sheet
Description
The NR110E series are buck converter ICs that
integrate the power MOSFET. With the current mode
control, ultra low ESR capacitors such as ceramic
capacitors can be used. The ICs have protection
functions such as Overcurrent Protection (OCP),
Undervoltage Lockout (UVLO) and Thermal Shutdown
(TSD). An adjustable Soft-start by an external capacitor
prevents the excessive inrush current in startup. The
feature increasing efficiency at light loads allows the
device to be used in the energy-saving applications. The
ICs integrate phase compensation circuit which reduces
the number of external components and simplifies the
design of customer application. The IC has the EN pin
that turns the regulator on or off, and achieves low
power consumption requirements. The package of
NR110E series is the eSOIC8 with an exposed thermal
pad on the back side.
Features
Up to 94% Efficiency
Up to 68% Efficiency at Maximum at Light Load
(VIN = 12 V, VO = 5 V, IO = 20 mA)
Current mode PWM control
Stable with Low ESR Ceramic Output Capacitors
No External Components Required by Incorporating
Phase Compensation
Soft-start Function
Adjustable Soft-start time with an External Capacitor
External ON/OFF Function
Protection Functions:
Overcurrent Protection (OCP): Drooping, auto-restart
Thermal Shutdown (TSD): Auto-restart
Undervoltage Lockout (UVLO)
Typical Application
Package
eSOIC8
1
8
2
7
3
6
4
5
Specification
Input Voltage, VIN = 6.5 V to 31 V
Output Voltage, VO = 0.8 V to 24 V
Maximum Output Current, IO
NR111E: 4 A
NR119E: 2 A
Operation Frequency
NR111E: 350 kHz
NR119E: 364 kHz
Application
AV Equipment
Auxiliary Power Supply
R1
VIN
R3
NR110E
1 BS
SS 8
2 IN
C3
3 SW
EN 7
ISET 6
4 GND FB 5
C1 C2
C7 D1
GND
L1
VOUT
R5
C4 C5
R4
R6
GND
Not to scale
NR110E-DSE Rev.1.5
SANKEN ELCTRIC CO., LTD.
1
Sep. 15, 2020
https://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2012




SANKEN

NR119E Datasheet Preview

NR119E Datasheet

Buck Converter

No Preview Available !

NR110E Series
Contents
Description ------------------------------------------------------------------------------------------------------ 1
Contents --------------------------------------------------------------------------------------------------------- 2
1. Absolute Maximum Ratings----------------------------------------------------------------------------- 3
2. Recommended Operating Conditions ----------------------------------------------------------------- 3
3. Electrical Characteristics -------------------------------------------------------------------------------- 4
4. Typical Performance Characteristics ----------------------------------------------------------------- 5
4.1. NR111E------------------------------------------------------------------------------------------------ 5
4.2. NR119E------------------------------------------------------------------------------------------------ 6
5. Block Diagram --------------------------------------------------------------------------------------------- 8
6. Pin Configuration Definitions--------------------------------------------------------------------------- 8
7. Typical Application --------------------------------------------------------------------------------------- 9
8. Physical Dimensions ------------------------------------------------------------------------------------ 10
9. Marking Diagram --------------------------------------------------------------------------------------- 12
10. Operational Description ------------------------------------------------------------------------------- 13
10.1. PWM Output Control ---------------------------------------------------------------------------- 13
10.2. Soft Start Function -------------------------------------------------------------------------------- 14
10.3. External ON/OFF Function --------------------------------------------------------------------- 14
10.4. Overcurrent Protection -------------------------------------------------------------------------- 15
10.5. Thermal Shutdown-------------------------------------------------------------------------------- 15
11. Design Notes ---------------------------------------------------------------------------------------------- 16
11.1. External Components ---------------------------------------------------------------------------- 16
11.1.1. Choke Coil, L1 ------------------------------------------------------------------------------- 16
11.1.2. Input Capacitor, CIN ------------------------------------------------------------------------ 17
11.1.3. Output Capacitor, COUT -------------------------------------------------------------------- 17
11.1.4. Freewheel Diode, D1 ------------------------------------------------------------------------ 18
11.1.5. Output Voltage, VO, and Output Capacitor-------------------------------------------- 19
11.2. Allowable power dissipation -------------------------------------------------------------------- 19
11.2.1. Power Supply Stability --------------------------------------------------------------------- 19
11.2.2. Spike Noise Reduction ---------------------------------------------------------------------- 19
11.2.3. Reverse Bias Condition--------------------------------------------------------------------- 20
11.3. Pattern Layout ------------------------------------------------------------------------------------- 21
11.3.1. Large Current Trace ----------------------------------------------------------------------- 21
11.3.2. Input and Output Capacitor -------------------------------------------------------------- 21
11.3.3. FB Pin Setting (Output Voltage Setting)------------------------------------------------ 21
12. Pattern Layout Example ------------------------------------------------------------------------------- 22
Important Notes---------------------------------------------------------------------------------------------- 24
NR110E-DSE Rev.1.5
SANKEN ELCTRIC CO., LTD.
2
Sep. 15, 2020
https://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2012


Part Number NR119E
Description Buck Converter
Maker SANKEN
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