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Details, datasheet, quote on part number:NCP1530DM30R2
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| Part: | NCP1530DM30R2 |
| Category: | Power Management => PWM Controllers |
| Description: | 600 ma Pwm/pfm Step-down Converter With External Synchronization Pin <<<>>>The NCP1530 is a Pwm/pfm Non−synchronous Step−down<<<>>>(Buck) DC/DC Converter For Usage in Systems Supplied From 1−cell<<<>>>Li−ion, or 2 or More Cells Alkaline/nicd/nimh Batteries. It CAN<<<>>>operate in Constant−Frequency PWM Mode or Pwm/pfm Mode In<<<>>>which The Controller Will Automatically Switch to PFM Mode<<<>>>operation at Low Output Loads to Maintain High Efficiency. The<<<>>>switching Frequency CAN Also be Synchronized to External Clock<<<>>>between 600 KHZ And 1.2 Mhz. The Maximum Output Current is Up<<<>>>to 600 MA. Applying an External Synchronizing Signal to SYN Pin<<<>>>can Supersede The PFM Operation. |
| Company: | ON Semiconductor |
| Datasheet: | Download NCP1530DM30R2 datasheet File size : 135 kB |
| Request For quote: | Find where to buy NCP1530DM30R2
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Datasheet text preview:
NCP1530 600 mA PWM/PFM Step-Down Converter with External Synchronization Pin
The NCP1530 is a PWM/PFM non-synchronous step-down (Buck) DC/DC converter for usage in systems supplied from 1-cell Li-ion, or 2 or more cells Alkaline/NiCd/NiMH batteries. It can operate in Constant-Frequency PWM mode or PWM/PFM mode in which the controller will automatically switch to PFM mode operation at low output loads to maintain high efficiency. The switching frequency can also be synchronized to external clock between 600 kHz and 1.2 MHz. The maximum output current is up to 600 mA. Applying an external synchronizing signal to SYN pin can supersede the PFM 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 i s disabled and the shutdown supply current is reduced to 0.5 mA (typ). Other features include built-in 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 5.0 V and is available in a space saving, low profile Micro8TM package.
Features http://onsemi.com MARKING DIAGRAM
Micro8] DM SUFFIX CASE 846A 1 xxxx A L Y W = Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week xxxx ALYW
8
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 = 4.3 V, · Current-Mode PWM Control · Automatic PWM/PFM Mode for Current Saving at Low Output Loads · Internal Switching Transistor Support 600 mA Output Current · High Switching Frequency (600 kHz), Support Small Size Inductor · · · · · · · · · · · · · ·
and Capacitor, Ceramic Capacitors Can be Used Synchronize to External Clock Signal up to 1.2 MHz 100% Duty Cycle for Maximum Utilization of the Supply Source Programmable Soft-Start Time through External Chip Capacitor Externally Accessible Voltage Reference Built-In Input Undervoltage Lockout Built-In Output Overvoltage Protection Power Saving Shutdown Mode Space Saving, Low Profile Micro8 Package PDAs Digital Still Camera Cellular Phone and Radios Portable Test Equipment Portable Scanners Portable Audio Systems (VIN = 5.0 V, VOUT = 3.3 V) VOUT = 3.3 V, IOUT = 300 mA
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 14 of this data sheet.
Typical Applications
© Semiconductor Components Industries, LLC, 2004
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March, 2004 - Rev. 2
Publication Order Number: NCP1530/D
NCP1530
L1 5.6 mH VIN = 2.8 V to 5.0 V VIN LX D1 MBRM120ET3 VOUT = 3.0 V
SYN
NCP1530
VOUT
SS *CSS GND CIN 22 mF
VREF
EN *CVREF 1.0 mF COUT 22 mF
*Optional Component
Figure 1. Typical Step-Down Converter Application
VIN 1 EN 5 ENABLE DETECT THERMAL SHUTDOWN MASTER ENABLE UVLO ISEN SYNC DETECT AND TIMING BLOCK MODE SELECTION
MODE ILIMIT ISEN
ISEN ISEN
SYN 2
+
- OV +
DRV
0.04 VREF - FB 50 nA - OTA + + - SS 3 VOLTAGE REFERENCE AND SOFT-START 10 pF VREF 7 + VREF
Figure 2. Simplified Functional Block Diagram
-
8 LX CONTROL LOGIC
6 VOUT
FB
4 GND
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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 fixed-frequency PWM mode primarily, and automatically switches to variable-frequency PFM mode at small output loads for power saving. SYNC = VIN (Constant-Frequency PWM mode) The converter operates at 600 kHz fixed-frequency 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. Soft-Start Timing control pin. An external soft-start capacitor can be connected to this pin if extended soft-start 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. If this pin is floated, built-in 500 ms (typ.) soft-start will be activated. Ground Terminal. Active-High Enable Input. Active to enable the device. Bring this pin to GND 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. Connected to voltage reference decoupling capacitor. For noise non-sensitive applications, the internal voltage reference can operate without decoupling capacitor. Inductor Terminal. This pin is connected to the drains of the internal P-channel switching transistors. The inductor must be connected between this pin and the output terminal. Description
3
SS
4 5 6 7 8
GND EN VOUT VREF LX
MAXIMUM RATINGS
Rating Power Supply (Pin 1) Input/Output Pins Pins 2-4 & Pins 7-8 Thermal Characteristics Micro8 Plastic Package Thermal Resistance, Junction-to-Air 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: JESD22-A114. Machine Model (MM) "200 V per JEDEC standard: JESD22-A115. 2. Latch-up Current Maximum Rating: "150 mA per JEDEC standard: JESD78. 3. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J-STD-020A. Symbol VIN VIO RqJA Value -0.3 to 6 -0.3 to 6 240 Unit V V °C/W
TJ TA Tstg
0 to +150 0 to +85 -55 to +150
°C °C °C
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