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参数资料
| 型号： | TPS40021PWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.01 A SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, PLASTIC, HTSSOP-16 |
| 文件页数： | 31/36页 |
| 文件大小： | 724K |
| 代理商： | TPS40021PWPG4 |
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TPS40020
TPS40021
SLUS535D MARCH 2003 REVISED JULY 2007
www.ti.com
4
ELECTRICAL CHARACTERISTICS
TJ = 40°C to 85°C, TJ = TA, VDD = 5.0 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLY
VDD
Input voltage range, VDD
2.25
5.50
V
VPVDD PVDD pin voltage
VDD = 3.3 V
4.9
5.2
V
Switching current
500 kHz, No load on HDRV, LDRV
3.5
5.0
IDD
Quiescent current
FB = 0.8 V
2.0
3.0
mA
IDD
Shutdown current
SS/SD = 0 V, Outputs OFF
0.38
1.00
mA
VUVLO
Minimum on-voltage
1.95
2.05
2.15
V
VUVLO
Hysteresis
80
130
200
mV
OSCILLATOR
fOSC
Accuracy
2.25 V
≤ VDD ≤ 5.00 V, RT = 69.8 k
425
500
575
kHz
fOSC
Accuracy
2.25 V
≤ VDD ≤ 5.00 V, RT = 34.8 k
800
950
1100
kHz
VRAMP Ramp voltage
VPEAKVVAL
0.80
0.93
1.07
V
VVAL
Ramp valley voltage
0.24
0.31
0.41
V
PWM
dMAX
Maximum duty cycle
VOSNS = VDD, RT = 34.8 k,
VDD = 3.3 V, FB = 0 V
85%
94%
dMAX
Maximum duty cycle
VOSNS = VDD, RT = 70 k,
VDD = 5.0 V, FB = 0 V
90%
95%
dMIN
Minimum duty cycle
0%
tMIN
Minimum HDRV on-time(2)
250
ns
ERROR AMPLIFIER
VFB
Feedback input voltage
40
°C ≤ TA ≤ 85°C, 2.25V ≤ VDD ≤ 5.00V
0.685
0.690
0.697
V
IBIAS
Input bias current
30
130
nA
VOH
High-level output voltage
IOH = 0.5 mA, VFB = GND
2.0
2.5
V
VOL
Low-level output voltage
IOL = 0.5 mA, VFB = VDD
0.08
0.15
V
IOH
High-level output source current
VFB = GND
3
7
mA
IOL
Low-level output sink current
VFB = VDD
3
8
mA
GBW
Gain bandwidth(1)
5
10
MHz
AOL
Open loop gain(1)
55
85
dB
CURRENT LIMIT
ISINK
Current limit sink current
2.25 V
≤ VDD ≤ 5.00 V, RT = 69.8 k
165
190
215
A
VOS
Current limit offset voltage
20
0
20
mV
tON
Minimum HDRV ontime in overcurrent
VDD = 3.3 V
200
300
ns
tON
Switch leading-edge blanking pulse time(1)
140
ns
tSS
Soft-start cycles
6
cycles
VILIM
Current limit input voltage range
2
VDD
V
SOFT START
ISS
Soft-start source current
Outputs = OFF
2.0
3.3
5.4
A
(1) Ensured by design. Not production tested.
(2) Operation below the minimum on-time could result in overlap of the HDRV and LDRV outputs.
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