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| 型號(hào)： | TPS62421DRCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.61 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件頁(yè)數(shù)： | 32/37頁(yè) |
| 文件大?。?/td> | 1020K |
| 代理商： | TPS62421DRCR |
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SLVS676C – JUNE 2006 – REVISED JUNE 2010
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
VIN = 3.6V, VOUT = 1.8V, EN = VIN, MODE = GND, L = 2.2mH, COUT = 20mF, TA = –40°C to 85°C typical values are at TA =
25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ttimeout
Timeout for entering power save
MODE/DATA Pin changes from high to low
520
ms
mode
POWER SWITCH
RDS(ON)
P-Channel MOSFET On-resistance,
VIN = VGS = 3.6V
280
620
m
Converter 1,2
ILK_PMOS
P-Channel leakage current
VDS = 6.0V
1
mA
RDS(ON)
N-Channel MOSFET On-resistance
VIN = VGS = 3.6V
200
450
m
Converter 1,2
ILK_SW1/SW2
Leakage Current into SW1/SW2 Pin
Includes N-Chanel leakage currnet,
6
7.5
mA
VIN = open, VSW = 6.0V, EN = GND
(4)
ILIMF
Forward Current
OUT1 600mA
2.5V
≤ VIN ≤ 6.0V
0.85
1.0
1.15
A
Limit PMOS and
OUT2 1000mA
1.19
1.4
1.61
NMOS
TSD
Thermal shutdown
Increasing junction temperature
150
°C
Thermal shudown hysteresis
Decreasing junction temperature
20
°C
OSCILLATOR
fSW
Oscillator frequency
2.5V
≤ VIN ≤ 6.0V
2.0
2.25
2.5
MHz
OUTPUT
VOUT
Adjustable output votage range
0.6
VIN
V
Vref
Reference voltage
600
mV
Voltage positioning active, MODE/DATA = GND,
1.01x
VOUT (PFM)
device operating in PFM mode, VIN = 2.5V to
–1.5%
2.5%
VOUT
5.0V (6) (7)
DC output voltage accuracy PFM
mode, adjustable and fixed output
MODE/DATA = GND; device operating in PWM
–1%
0%
1%
voltage(5)
Mode VIN = 2.5V to 6.0V(7)
VOUT
VIN = 2.5V to 6.0V, Mode/Data = VIN , Fixed PWM
–1%
0%
1%
operation, 0mA < IOUT < IOUTMAX
(8)
DC output voltage load regulation
PWM operation mode
0.5
%/A
tStart up
Start-up time
Activation time to start switching(9)
170
ms
tRamp
VOUT Ramp UP time
Time to ramp from 5% to 95% of VOUT
750
ms
(4)
At pins SW1 and SW2 an internal resistor of 1M
is connected to GND
(5)
Output voltage specification does not include tolerance of external voltage programming resistors
(6)
Configuration L typ 2.2mH, COUT typ 20mF, see parameter measurement information, the output voltage ripple depends on the effective
capacitance of the output capacitor, larger output capacitors lead to tighter output voltage tolerance
(7)
In Power Save Mode, PWM operation is typically entered at IPSM = VIN/32.
(8)
For VOUT > 2.2V, VIN min = VOUT +0.3V
(9)
This time is valid if one converter turns from shutdown mode (EN2 = 0) to active mode (EN2 =1) AND the other converter is already
enabled (e.g., EN1 = 1). In case both converters are turned from shutdown mode (EN1 and EN2 = low) to active mode (EN1 and/or
EN2=1) a value of typ 80 ms for ramp up of internal circuits needs to be added. After tStart the converter starts switching and ramps
VOUT.
4
Copyright 2006–2010, Texas Instruments Incorporated
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