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Part: PT5823A
Category:
Power Management
-> Plug-in Power Solutions->Non-Isolated->Single Posi
Description: ti PT5823, 1.8V 16A, 12-V Input Adjustable Step-down Isr
Company: Texas Instruments, Inc.
Datasheet: Download PT5823A datasheet File size : 209 kB
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Datasheet text preview:
PT5820 Series
16-A 12-V Input Adjustable Integrated Switching Regulator
SLTS172
(Released 8/23/2002)
Features
· · · · · · · 12V Input DSP Compatible High Efficiency (90+%) Output Margin Control (±5%) Adjustable Output Voltage On/Off Enable Function Over-Current Protection · Thermal Shutdown · Low-Profile (8mm) · Small Footprint (0.736 in², Suffix `N') · Solderable Copper Case · Surface Mount Compatible
Description
The PT5820 ExcaliburTM series of integrated swi tc hi ng regulators (ISRs) combines outstanding power density with a comprehensive list of features. They are an ideal choice for applications where board space is a premium and performance cannot be compromised. These modules provide a full 16A of output current, yet are housed in a low-profile, 18-pin, package. The integral copper case construction requires no heatsink, and offers the advantages of solderability and a small footprint (0.736 in² for suffix `N'). Both through-hole and surface mount pin configurations are available. The PT5820 series operates from a 12-V input bus and provides a convenient point-of-load power source for the industry's latest high-performance DSPs and microprocessors. The series includes output voltage options as low as 1.0VDC. Other features include external output voltage adjustment, a ±5% margin control, on/off enable, short circuit protection, and thermal shutdown. A 560-µF input capacitor and 330µF output capacitor are required for proper operation.
Ordering Information
PT5827H PT5821H PT5822H PT5823H PT5824H PT5825H PT5826H = 5.0 Volts = 3.3 Volts = 2.5 Volts = 1.8 Volts = 1.5 Volts = 1.2 Volts = 1.0 Volts
Pin-Out Information
Pin Function
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Vo Adjust Inhibit * Margin Down Margin Up Vin Vin Vin Sense() GND GND GND GND GND Vout Vout Vout Vout Sense(+)
PT Series Suffix (PT1234 x )
Case/Pin Configuration Vertical Horizontal SMD Order Suffix Package Code (EPP) (EPQ) (EPS)
N A C
(Reference the applicable package code drawing for the dimensions and PC board layout)
* For Inhibit pin: Open = output enabled Ground = output disabled
Standard Application
Margin Down Margin Up Vo Adjust
1 5, 6, 7 4 3 18 1417 Sense(+)
VOUT
VIN
+
PT5820
2 913 8
Inhibit GND
Sense()
For technical support and more information, see inside back cover or visit www.ti.com
+ L O A D
CIN 560µF (Required)
COUT 330µF (Required)
GND
Cin = Required 560µF Cout = Required 330µF (Note 3)
PT5820 Series
16-A 12-V Input Adjustable Integrated Switching Regulator
Performance Specifications
Characteristics Output Current Input Voltage Range Set-Point Voltage Tolerance Temperature Variation Line Regulation Load Regulation Total Output Variation Efficiency
(Unless otherwise stated, T a =25°C, V in =12V, Cin =560µF, C out =330µF, and Io =Iomax)
Symbols Io Vin Vo tol Regtemp Regline Regload Regtot
Conditions Over Io range 40°C Min 0 10.8 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 300 Vin 0.5 0.2 -- -- 560 (2) 330 (3) 40 -- -- -40 6.3 -- -- --
PT5820 Series Typ Max
-- -- -- ±0.5 ±6 ±12 -- 93 90 88 84 82 80 77 20 50 70 22 ±10 ±5 350 -- -- 0.5 2 -- -- -- TBD TBD -- -- TBD TBD (5) 20 16 13.2 ±2 -- -- -- ±3 -- -- -- -- -- -- -- -- -- -- -- -- -- 400 Open (1) 0.8 -- -- -- TBD +85 (4) -- -- +125 -- -- -- --
Units A V %Vo %Vo mV mV %Vo
%
Vo Ripple (pk-pk) Transient Response Over-Current Threshold Output Voltage Adjust Switching Frequency Inhibit Control (pin 2) Input High Voltage Input Low Voltage Input Low Current Standby Input Current External Input Capacitance External Output Capacitance Operating T mperature Range e Over-T mperature Shutdown e Storage T mperature e Reliability Mechanical Shock Mechanical Vibration Weight Flammability
Vr ttr Vtr ITRIP Vo adj s VIH VIL IIL Iin standby Cin Cout Ta OTP Ts MTBF
mVpp µSec mV A % kHz V mA mA µF µF °C °C °C 106 Hrs G's G's grams
Over Vin range Center of case, auto-reset
Vo 3.3V Vo 2.5V
-- --
-- Per Bellcore TR-332 50% stress, Ta =40°C, ground benign Mil-STD-883D, Method 2002.3 Half Sine, mounted to a fixture Mil-STD-883D, Method 2007.2, Vertical 20-2000 Hz, PCB mounted Horizontal -- Materials meet UL 94V-0
Notes: (1) The Inhibit control (pin 2) has an internal pull-up to 12V (Vin ), and if left open-circuit the module will operate when input power is applied. A small low-leakage (<100nA) MOSFET is recommended to control this input. See application notes for more information. (2) A 560µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimumm of 1.3Arms of ripple current. For further information, consult the related application note on capacitor selection. (3) An external 330µF output capacitor is required for proper operation. Distributed load capacitance can be included in this value. (4) See SOA curves or consult factory for the appropriate derating. (5) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.
For technical support and more information, see inside back cover or visit www.ti.com
PT5820 Series
16-A 12-V Input Adjustable Integrated Switching Regulator
Pin Descriptions
+Vin: The positive supply voltage input for the module with respect to the common GND. +Vo: This is the regulated output voltage from the module with respect to the common GND. GND: The common GND node to which the input, output, and external control signals are referenced. Sense(): Provides the regulator with the ability to sense the set-point voltage directly across the load. For optimum output voltage accuracy this pin should always be connected to GND, even for applications that demand a relatively light load. Sense(+): When used with Sense(), the regulation circuitry will compensate for voltage drop between the converter and the load. The pin may be left open circuit, but connecting it to +Vo will optimize load regulation.. Inhibit: This is an active low input, which is referenced to GND. Driving this pin to GND disables the module's output voltage. If Inhibit is left open-circuit, the output will be active whenever a valid input source is applied. Vo Adjust: This pin is used to trim the output voltage to a value within a range of up to ±10% of the setpoint. The adjustment requires an external resistor. The resistor is connected from Vo Adjust, to either the Sense() or Sense(+), in order to adjust the output voltage either up or down, respectively. Margin Up: When this pin is connected to Sense(), the output voltage is increased by 5% of the nominal setpoint. The Margin Up and Margin Down control inputs provide a convenient method for testing the operation of the load circuit over a ±5% variation in the supply voltage. Margin Down: When this pin is connected to Sense(), the output voltage is decreased by approximately 5% from the nominal.
Typical Characteristics Performance Data; Vin =12.0V (See Note A)
Efficiency vs Output Current
100 8
Power Dissipation vs Output Current
90
80
70
PT5827 PT5821 PT5822 PT5823 PT5824 PT5825 PT5826
6
Efficiency - %
Pd - Watts
4
PT5827 PT5821 PT5824 PT5826
2 60
50 0 4 8 12 16
0 0 4 8 12 16
Iout (A)
Iout (A)
Output Ripple vs Output Current
50
40
30
20
PT5827 PT5821 PT5822 PT5823 PT5824 PT5825 PT5826
Ripple - mV
10
0 0 4 8 12 16
Iout (A)
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer's maximum rated operating temperatures.
For technical support and more information, see inside back cover or visit www.ti.com
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