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Details, datasheet, quote on part number:NCP1530DM33R2
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| Part: | NCP1530DM33R2 |
| Category: | Power Management => DC-DC Converters => DC-DC Switching => Converters |
| Description: | up to 600 MA, 2.5V, 600kHz Buck Pwm/pfm Switching Regulator With External Synchronization Pin, Package: Micro-8, Pins=8 |
| Company: | ON Semiconductor |
| Datasheet: | Download NCP1530DM33R2 datasheet File size : 51 kB |
| Request For quote: | Find where to buy NCP1530DM33R2
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Datasheet text preview:
NCP1530 Product Preview 600 mA PWM/PFM Step-Down Converter with External Synchronization Pin
The NCP1530 is a PWM/PFM nonsynchronous stepdown (Buck) DC/DC converter for usage in systems supplied from 1cell Liion, 2 and more cells Alkaline/NiCd/NiMH batteries. It can operate in ConstantFrequency PWM mode or PWM/PFM mode in which the controller will automatically switches to PFM mode operation at low output loads for higher efficiency. The switching frequency can also be synchronized to external clock between 600 kHz and 1200 kHz. A maximum output current is up to 600 mA. Applying an external synchronizing signal to SYN pin can supersede the PWM operation. The NCP1530 consumes only 47 mA (typ.) of supply current (VOUT = 3.0 V, no switching) and can be forced to shutdown mode by bringing the enable input (EN) low. In shutdown mode, the regulator is disabled and the supply current is reduced to 0.5 mA (max) while VOUT is internally pulled to ground with output capacitor discharged. Other features include builtin undervoltage lockout, internal thermal shutdown, an externally programmable soft start time and output current limit protection. The NCP1530 operates from a maximum input voltage of 5.5 V and is available in a space saving, low profile Micro8t package.
Features http://onsemi.com MARKING DIAGRAM
Micro8t DM SUFFIX CASE 846A 1 TBD ALYW
8
A L Y W
= Assembly Location = Wafer Lot = Year = Work Week
PIN CONNECTIONS
VIN SYN SS GND 1 2 3 4 (Top View) 8 7 6 5 LX VREF VOUT EN
· High Conversion Efficiency, up to 92% at VIN = 4.0 V, · · · · · · · · · · · · · · · · · ·
VOUT = 3.3 V, IOUT = 500 mA CurrentMode PWM Control Automatic PWM/PFM Mode for Current Saving at Low Output Loads Internal Switching Transistor Support 600 mA Output Current (VIN = 5.0 V, VOUT = 3.3 V) High Switching Frequency (600 kHz) Support Small Inductor and Capacitor Size Synchronizable to External Clock Signal up to 1.2 MHz 100% Duty Cycle for Maximum Utilization of the Supply Source Programmable SoftStart Time through External Chip Capacitor Output Current Limit Protection BuiltIn Input Undervoltage Lockout Power Saving Shutdown Mode Automatic Output Capacitor Discharge while in Shutdown Mode Space Saving, Low Profile Micro8 Package PDAs Digital Still Camera Cellular Phone and Radios Portable Test Equipment Portable Scanners Portable Audio Systems
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 5 of this data sheet.
Typical Applications
This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2002
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May, 2002 Rev. 0
Publication Order Number: NCP1530/D
NCP1530
L1 10 mH VIN = 2.8 V to 5.5 V VIN LX D1 MBRM120ET3 VOUT = 2.5 V
SYN
NCP1530
VOUT
SS *CSS GND CIN 22 mF
VREF
EN *CVREF 1.0 mF COUT 22 mF
*Optional Component
Figure 1. Typical StepDown Converter Application
VIN EN DETECTION TSD UVLO MASTER EN
EN
DRV ISEN
SYN
SYNC DETECTION AND TIMING BLOCK
MODE SELECTION
MODE
LX ILIM
OV + MODE FB OTA + + MASTER EN + VREF SS SOFT START Control Logic FB VOUT
GND
Figure 2. Representative Block Diagram
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NCP1530
PIN FUNCTION DESCRIPTIONS
Pin 1 2 Symbol VIN SYN Unregulated Supply Input. Oscillator Synchronization and Mode Selection Input. SYNC = GND (Automatic PWM/PFM mode) The converter operates at 600 kHz fixedfrequency PWM mode primarily, and automatically switches to variablefrequency PFM mode at small output loads for current saving. SYNC = VIN (ConstantFrequency PWM mode) The converter operates at 600 kHz fixedfrequency PWM mode always. SYNC = External clock signal between 600 to 1200 kHz. The converter will be synchronized with the external clock signal. The SYNC pin is internally pulled to GND. 3 SS SoftStart Input. An external softstart capacitor is connected to this pin if extended softstart is required. A 50 nA current will be sourced from this pin to charge up the capacitor during startup and gently ramps the device into service to prevent output voltage overshoot. Builtin 200 ms (typ.) softstart can be activated if the pin is floated. Ground Terminal. ActiveHigh Enable Input. Active to enable the device. Bring this pin to GND, output capacitor will be discharged to ground and the quiescent current is reduced to less than 0.5 mA. This pin is internally pulled to VIN. Feedback Terminal. The output voltage is sensed by this pin and regulated. The output capacitor connected to this pin will be discharged by internal switch to ground when the converter is in shutdown mode. Connected to voltage reference decoupling capacitor. For noise nonsensitive applications, the internal voltage reference can operate without decoupling capacitor. Inductor Terminal. This pin is connected to the drains of the internal Pchannel switching transistors. The inductor must be connected between this pin and the output terminal. Description
4 5
GND EN
6
VOUT
7 8
VREF LX
MAXIMUM RATINGS
Rating Power Supply (Pin 1) Input/Output Pins Pins 24 & Pins 78 Thermal Characteristics Micro8 Plastic Package Thermal Resistance, JunctiontoAir Operating Junction Temperature Range Operating Ambient Temperature Range Storage Temperature Range 1. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM) "2.0 kV per JEDEC standard: JESD22A114. Machine Model (MM) "200 V per JEDEC standard: JESD22A115. 2. Latchup Current Maximum Rating: "150 mA per JEDEC standard: JESD78. 3. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: JSTD020A. Symbol VIN VIO RJA Value 0.3 to 6 0.3 to 6 240 Unit V V °C/W
TJ TA Tstg
40 to +150 40 to +85 55 to +150
°C °C °C
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