BQ24070_14 Datasheet, PDF (8/33 Pages) Texas Instruments – System Power-Path Management IC

bq24070, bq24071
SLUS694G – MARCH 2006 – REVISED DECEMBER 2014
www.ti.com
Electrical Characteristics (continued)
over junction temperature range (0°C ≤ T_J ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
SWITCHING POWER SOURCE TIMING
t_SW-BAT
Switching power source from input
to battery
THERMAL SHUTDOWN REGULATION⁽¹²⁾
When input applied. Measure from:
[PG: Lo → Hi to I_(IN) > 5 mA],
I_(OUT) = 100 mA,
R_TRM = 50 K
50
μs
T_(SHTDWN)
T_J(REG)
UVLO
Temperature trip
Thermal hysteresis
Temperature regulation limit
T_J (Q1 and Q3 only)
T_J (Q1 and Q3 only)
T_J (Q2)
155
30
°C
115
135
V_(UVLO)
Undervoltage lockout
Hysteresis
Decreasing V_CC
2.45
2.50
2.65
V
27
mV
V_REF OUTPUT
V_O(VREF)
Output regulation voltage
Regulation accuracy⁽¹³⁾
Active only if IN or USB is present,
V_I(OUT) ≥ V_O(VREF) + (I_O(VREF) × R_DS(on))
–5%
3.3
V
5%
I_O(VREF)
R_DS(on)
C_(OUT) ⁽¹⁴⁾
Output current
On resistance
Output capacitance
OUT to V_REF
20
mA
50
Ω
1
μF
(12) Reaching thermal regulation reduces the charging current. Battery supplement current is not restricted by either thermal regulation or
shutdown. Input power FETs turn off during thermal shutdown. The battery FET is only protected by a short-circuit limit which typically
does not cause a thermal shutdown (input FETs turning off) by itself.
(13) In standby mode (CE low) the accuracy is ±10%.
(14) V_REF output capacitor not required, but one with a value of 0.1 μF is recommended.
7.6 Typical Characteristics
4.44
4.42
V_OUT, V_AC = 5.5 V
I_I = 100 A
+3 Sigma
4.4
4.38
Mean
4.36
4.34
-3 Sigma
4.32
-60 -40 -20
0
20 40 60 80 100 120 140
T - Temperatures - ^oC
Figure 1. SIGMA Typical OUT Voltage Regulation, bq24070
8
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