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TPS84210RKGR Datasheet(Folha de dados) 4 Page - Texas Instruments

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Nome de Peças. TPS84210RKGR
descrição  2.95-V to 6-V Input, 2-A Synchronous Buck, Integrated Power Solution
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Fbricantes  TI1 [Texas Instruments]
Página de início  http://www.ti.com
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TPS84210
SLUSAN7A – SEPTEMBER 2011 – REVISED MARCH 2012
www.ti.com
ELECTRICAL CHARACTERISTICS
Over -40°C to 85°C free-air temperature, VIN = 3.3 V, VOUT = 1.8 V, IOUT = 2A,
CIN1 = 47 µF ceramic, CIN2 = 220 µF poly-tantalum, COUT1 = 47 µF ceramic, COUT2 = 100 µF poly-tantalum (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IOUT
Output current
TA = 85°C, natural convection
0
2
A
VIN
Input voltage range
Over IOUT range
2.95(1)
6
V
VIN = increasing
3.05
3.135
UVLO
VIN Undervoltage lockout
V
VIN = decreasing
2.5
2.75
VOUT(adj)
Output voltage adjust range
Over IOUT range
0.8
3.6
V
Set-point voltage tolerance
TA = 25°C, IOUT = 0A
±1.0% (2)
Temperature variation
-40°C
≤ TA ≤ +85°C, IOUT = 0A
±0.3%
VOUT
Line regulation
Over VIN range, TA = 25°C, IOUT = 0A
±0.1%
Load regulation
Over IOUT range, TA = 25°C
±0.1%
Total output voltage variation
Includes set-point, line, load, and temperature variation
±1.5% (2)
VOUT = 3.3V, fSW = 1.5 MHz
95%
VOUT = 2.5V, fSW = 1.5 MHz
93%
VOUT = 1.8V, fSW = 1 MHz
92%
VIN = 5 V
VOUT = 1.5V, fSW = 1 MHz
91%
IO = 1 A
VOUT = 1.2V, fSW =750 kHz
90%
VOUT = 1.0V, fSW = 650 kHz
88%
η
Efficiency
VOUT = 0.8V, fSW = 650 kHz
87%
VIN = 3.3V
VOUT = 1.8V, fSW = 1 MHz
93%
IO = 1 A
VOUT = 1.5V, fSW = 1 MHz
92%
VOUT = 1.2V, fSW = 750 kHz
91%
VOUT = 1.0V, fSW = 650 kHz
89%
VOUT = 0.8V, fSW = 650 kHz
87%
Output voltage ripple
20 MHz bandwith
9
mVPP
ILIM
Overcurrent threshold
3.5
A
Recovery time
80
µs
Transient response
1.0 A/µs load step from 0.5A to 1.5A
VOUT
45
mV
over/undershoot
VINH-H
Inhibit High Voltage
1.25
Open (3)
Inhibit Control
V
VINH-L
Inhibit Low Voltage
–0.3
1.0
II(stby)
Input standby current
INH pin to AGND
70
100
µA
Good
93%
VOUT rising
Fault
107%
PWRGD Thresholds
Power
Fault
91%
Good
VOUT falling
Good
105%
PWRGD Low Voltage
I(PWRGD) = 0.33 mA
0.3
V
fSW
Switching frequency
Over VIN and IOUT ranges, RT/CLK pin OPEN
400
500
600
kHz
fCLK
Synchronization frequency
500
2000
kHz
VCLK-H
CLK High-Level Threshold
2.2
3.3
V
CLK Control
VCLK-L
CLK Low-Level Threshold
-0.3
0.4
V
CLK_PW CLK Pulse Width
75(4)
ns
Thermal shutdown
175
°C
Thermal Shutdown
Thermal shutdown hysteresis
15
°C
(1)
The minimum VIN depends on VOUT and the switching frequency. Please refer to Table 7 for operating limits.
(2)
The stated limit of the set-point voltage tolerance includes the tolerance of both the internal voltage reference and the internal
adjustment resistor. The overall output voltage tolerance will be affected by the tolerance of the external RSET resistor.
(3)
This control pin has an internal pullup. Do not place an external pull-up resistor on this pin. If this pin is left open circuit, the device
operates when input power is applied. A small low-leakage MOSFET is recommended for control. See the application section for further
guidance.
(4)
The maximum synchronization clock pulse width is dependant on VIN, VOUT, and the synchronization frequency. See the
Synchronization (CLK) section for more information.
4
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Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS84210




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