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参数资料
| 型号： | TPS53321RGTR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 1210 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, QFN-16 |
| 文件页数： | 19/23页 |
| 文件大小： | 505K |
| 代理商： | TPS53321RGTR |
www.ti.com
SLUSAF3 – DECEMBER 2010
ELECTRICAL CHARACTERISTICS (continued)
over recommended free-air temperature range, VIN = 3.3 V, VVDD = 3.3 V, PGND = GND (Unless otherwise noted).
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
LOGIC PINS: I/O VOLTAGE AND CURRENT
VPGPD
PGD pull down voltage
Pull-down voltage with 4-mA sink current
0.2
0.4
V
IPGLK
PGD leakage current
Hi-Z leakage current, apply 3.3-V in off state
–2
0
2
A
RENPU
Enable pull up resistor
1.35
M
Ω
VENH
EN logic high threshold
1.10
1.18
1.30
V
VENHYS
EN hysteresis
0.18
0.24
V
Level 1 to level 2(2)
0.12
Level 2 to level 3
0.4
PSTHS
PS mode threshold voltage
Level 3 to level 4
0.8
V
Level 4 to level 5
1.4
Level 5 to level 6
2.2
IPS
PS source
10-A pull-up current when enabled.
8
10
12
A
fSYNCSL
Slave SYNC frequency range
Versus nominal switching frequency
–20%
20%
PWSYNC
SYNC low pulse width
110
ns
ISYNC
SYNC pin sink current
TA = 25°C
10
A
VSYNCTHS
(3)
SYNC threshold
Falling edge
1.0
V
VSYNCHYS
(3)
SYNC hysteresis
0.5
V
BOOT STRAP: VOLTAGE AND LEAKAGE CURRENT
IVBSTLK
VBST leakage current
VIN = 3.3V, VVBST = 6.6 V, TA = 25°C
1
A
TIMERS: SS, FREQUENCY, RAMP, ON-TIME AND I/O TIMING
tSS_1
Delay after EN asserting
EN = 'HI', master or HEF mode
0.2
ms
tSS_2
Delay after EN asserting
EN = 'HI', slave waiting time
0.5
ms
tSS_3
Soft-start ramp-up time
Rising from VSS = 0 V to VSS = 0.6 V
0.4
ms
Rising from VSS = 0 V to VSS = 0.6 V,
tPGDENDLY
PGD startup delay time
1.2
ms
from VSS reaching 0.6 V to VPGD going high
Overvoltage protection delay
tOVPDLY
Time from FB out of +20% of VREF to OVP fault
1.0
1.7
2.5
s
time
Undervoltage protection delay
tUVPDLY
Time from FB out of -20% of VREF to UVP fault
11
s
time
fSW
Switching frequency control
FCCM
0.99
1.1
1.21
MHz
Ramp amplitude(3)
2.9 V < VIN < 6.0 V
VIN/4
V
FCCM or DE mode
100
140
tMIN(off)
Minimum OFF time
ns
HEF mode
175
250
Maximum duty cycle, FCCM
84%
89%
and DE mode
DMAX
fSW = 1.1 MHz, 0°C ≤ TA ≤ 85°C
Maximum duty cycle, HEF
75%
81%
mode
Soft-discharge transistor
RSFTSTP
VEN = Low, VIN = 3.3 V, VOUT = 0.5 V
60
Ω
resistance
(2)
See PS pin description for levels.
(3)
Ensured by design. Not production tested.
Copyright 2010, Texas Instruments Incorporated
5
Product Folder Link(s) :TPS53321
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