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NCP1500DMR2

P1-P3P4-P6P7-P9P10-P12
Semiconductor Components Industries, LLC, 2004
February, 2004 − Rev. 4
1 Publication Order Number:
NCP1500/D
NCP1500
Dual Mode PWM/Linear
BUCK Converter
The NCP1500 is a dual mode converter that operates as either a
pulse width modulated (PWM) buck converter or as a linear regulator.
The converter automatically transitions between the two modes. The
converter operates as a PWM when a synchronization signal is present
at the sync input. The converter operates as a linear regulator in the
absence of a synchronization signal. The PWM mode offers excellent
performance at normal to heavy loads at the sacrifice of output ripple
voltage. The linear mode offers excellent noise rejection at the
sacrifice of system efficiency. The user is able to select which mode
will give the best performance for a given operating condition.
Internal protection features include thermal shutdown with hysteresis
and cycle−by−cycle current limit in the PWM mode. Additionally, the
converter transitions into PFM mode at very light loads if a
synchronization signal is present and an output overvoltage condition
is detected.
PWM Features
• Current Mode Control with Cycle−by−Cycle Current Limit
• Nominal Synchronization Frequency of 270 to 630 kHz
• Built−in Slope Compensation
Linear Regulator Features
• Low Output Noise
Overall Features
• Thermal Shutdown with Hysteresis
• Digitally Programmable Output Voltage Between 4 Voltages:
1.0, 1.3, 1.5, and 1.8
• Fast Transient Response
• Input Voltage Range From 2.7 V to 5.4 V
• Space Saving Micro8 Package
• Low Shutdown Current of 0.18 A Typical
• Pb−Free Package is Available
Typical Applications
• Baseband Supplies for Portable Handsets
• PDAs
• Supplies for DSP Circuitry
Figure 1. Typical Operating Circuit
C
OUT
MBRM120
L
L = 15 H
C
IN
= 10 F
C
OUT
= 10 F
8
7
6
5
1
2
3
4
SHD
SYN
V
O
LX
CB0
CB1
GND
V
IN
V
IN
C
IN
8
7
6
5
1
2
3
4
Micro8
(MSOP−8)
DM SUFFIX
CASE 846A
8
1
1
8
A = Assembly Location
Y = Year
W = Work Week
MARKING
DIAGRAM
PIN CONNECTIONS
SHD
SYN
V
O
LX
CB0
CB1
GND
V
IN
Device Package Shipping
†
ORDERING INFORMATION
NCP1500DMR2 Micro8 4000 Tape/Reel
(Top View)
1500
AYW
http://onsemi.com
NCP1500DMR2G Micro8
(Pb−Free)
4000 Tape/Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
NCP1500
http://onsemi.com
2
PIN FUNCTION DESCRIPTIONS
Pin # Symbol Pin Description
1 SHD Device is placed in shutdown when SHD is driven low. In shutdown mode, the internal MOSFET and output
are turned off. Driven to high for normal operation. This pin is floating internally and needs to be tied to a
fixed source externally.
2 SYN External Synchronization Clock Signal Input. If a clock signal is present at this pin, the device will go into
PWM mode. If SYN is driven low, the device operates in linear mode.
3 V
O
Connected to internal voltage divider for feedback.
4 LX Pin for the connection between the drain of the internal P−MOSFET and the external inductor.
5 V
IN
Voltage Supply Input. Bypass with 10 F capacitor.
6 GND Ground.
7 CB1 Control Bit 1 Input for output voltage level selection. Internally pulled low.
8 CB0 Control Bit 0 Input for output voltage level selection. Internally pulled low.
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply (Pin 5) V
IN
−0.3 to 6.0 V
Input/Output Pins
Pin 1−4 & Pin 7−8
V
IO
−0.3 to 6.0 V
Thermal Characteristics
Micro8 Plastic Package
Thermal Resistance Junction to Air
R
JA
240 °C/W
Operating Junction Temperature Range T
J
−40 to +140 °C
Operating Ambient Temperature Range T
A
− 40 to +85 °C
Storage Temperature Range T
stg
− 55 to +150 °C
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM) 2.0 kV per JEDEC standard: JESD22−A114.
Machine Model (MM) 200 V per JEDEC standard: JESD22−A115.
2. Latch−up Current Maximum Rating: 150 mA per JEDEC standard: JESD78.
NCP1500
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (V
IN
= 3.6 V, V
O
= 1.5 V, T
A
= 25°C, Fsyn = 600 kHz 50% Duty Cycle sinewave with V
H
= 2.0 V
and V
L
= 0 V for PWM mode; T
A
= −40 to 85°C for Min/Max values, unless otherwise noted.)
Characteristic
Symbol Min Typ Max Unit
Input Voltage Range V
IN
2.7 − 5.4 V
Main FET Leakage Current (Pins 5 to 4) T
A
= 25°C
Main FET Leakage Current (Pins 5 to 4) T
A
= −40°C to 85°C
I
LEAK
−
−
0.06
−
0.3
10
A
Mode Selection Pin
SYN “H” Input Voltage
V
SYNH
1.3 − − V
SYN “L” Input Voltage V
SYNL
− − 1.1 V
SYN “H” Input Current I
SYNH
− 0 0.5 A
SYN “L” Input Current I
SYNL
−0.5 0 − A
External Synchronization Frequency F
SYNC
270 − 630 kHz
Output Level Selection Pins
CB “H” Input Voltage Threshold
V
CBH
0.90 − − V
CB “L” Input Voltage Threshold V
CBL
− − 0.63 V
CB “H” Input Current I
CBH
− 0.1 − A
CB “L” Input Current I
CBL
− 0 − A
Shutdown Pin
SHD “H” Input Voltage Threshold V
SHDH
0.59 − − V
SHD “L” Input Voltage Threshold V
SHDL
− − 0.26 V
SHD “H” Input Current I
SHDH
− 0.1 − A
SHD “L” Input Current I
SHDL
− 0 − A
PWM Mode
Output Voltage (I
OUT
= 35 mA, T
A
= 25°C)
CB0, CB1 = (H, H)
CB0, CB1 = (H, L)
CB0, CB1 = (L, L)
CB0, CB1 = (L, H)
V
OUT0
0.941
1.235
1.425
1.710
0.99
1.30
1.50
1.80
1.050
1.365
1.575
1.890
V
Line Regulation, I
out
= 100 mA
3.0 to 3.6 V
3.0 to 4.2 V
V
out0
−
−
1.0
2.0
−
−
mV
Load Regulation
50 to 120 mA
20 to 200 mA
V
out0
−
−
1.0
13
−
−
mV
Minimum On−Time TON
MIN
− 210 − nsec
Internal PFET ON−Resistance (I
LX
= 400 mA, V
IN
= 2.0 V) R
DS(ON)_P
− 0.65 1.2
Main Output Switch Current Limit I
LIM
− 800 − mA
Linear Regulator Mode (Lx shorted to Vo)
Output Voltage (I
out
= 0 mA, T
A
= 25°C)
CB0, CB1 = (H, H)
CB0, CB1 = (H, L)
CB0, CB1 = (L, L)
CB0, CB1 = (L, H)
V
out0
0.941
1.235
1.425
1.710
0.99
1.30
1.50
1.80
1.050
1.365
1.575
1.890
V
Startup Current Load in Linear Mode ISTART
LIN
80 − − mA
Overvoltage Protection
Output Overvoltage Threshold in PWM Mode
VO
PFM
− +5.0 +10 %
Total Device
Power Supply Current
Standby (SHD tied low, V
IN
= 3.6 V, SYN tied low) T
A
= 25°C
T
A
= −40°C to 85°C
PWM Mode (SHD tied high, V
IN
= 3.6 V, V
out
= 1.6 V, V
CB0
= V
CB1
= 0 V,
SYN @ 600 kHz/50% duty cycle, I
out
= 0 mA)
Linear Mode (SHD tied high, V
IN
= 3.6 V, V
out
= 1.5 V, SYN tied low,
I
out
= 0 mA)
I
CC
−
−
−
−
0.18
−
96
30
0.5
10
150
70
A
P1-P3P4-P6P7-P9P10-P12

NCP1500DMR2

Mfr. #:
Buy NCP1500DMR2
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators Dual Mode PWM
Lifecycle:
New from this manufacturer.
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